Engineers check both strength and serviceability during design.
填写：
主语：
谓语：
宾语：
时间/阶段：
练习4
A beam with insufficient stiffness may deflect too much under normal loads.
填写：
主语：
谓语：
补充信息：
练习5：长句
Although a beam may have enough strength to resist failure, it can still experience excessive deflection under normal service loads.
填写：
主句主语：
主句谓语：
主句宾语：
Although部分：
主干：
参考答案
参考答案
1
主语：Structural strength
谓语：helps
宾语：members
补充动作：resist applied loads
主干：
Strength helps members.
更有意义的核心结构：
Strength helps members resist loads.
2
主语：Sufficient stiffness
谓语：controls
宾语：excessive structural movement
主干：
Stiffness controls movement.
3
主语：Engineers
谓语：check
宾语：both strength and serviceability
补充：during design
主干：
Engineers check strength and serviceability.
4
主语：A beam
谓语：may deflect
补充：with insufficient stiffness / too much / under normal loads
主干：
A beam may deflect.
5
主句主语：it
主句谓语：can experience
主句宾语：excessive deflection
让步部分：Although a beam may have enough strength to resist failure
主干：
It can experience excessive deflection.
it 指：
a beam
⑥ Grammar｜Unit 7错题回炉
今天不进入 Unit 8。
重点复习：
have/has + 过去分词
一、先朗读三栏
原形
过去式
过去分词
go
went
gone
see
saw
seen
do
did
done
come
came
come
break
broke
broken
grow
grew
grown
forget
forgot
forgotten
shrink
shrank
shrunk
take
took
taken
write
wrote
written
二、选择正确形式
1
The engineer has ______ the drawing. checked / check
2
The client has already ______ home. went / gone
3
Have you ______ the connection detail? saw / seen
4
The plate has ______ under the load. bent / bend
5
The engineer has just ______ the calculation. done / did
6
The drawing has not ______ yet. arrived / arrive
答案
答案
checked
gone
seen
bent
done
arrived
三、一般过去时与现在完成时
有明确过去时间
I checked the drawing yesterday.
不能写：
I have checked the drawing yesterday.
不强调具体时间，强调现在结果
I have checked the drawing.
⑦ 今日阅读｜25分钟
Strength and Serviceability in Structural Design
Structural design must satisfy both strength and serviceability requirements. Strength relates to the ability of a structure or member to resist loads without failure. Serviceability relates to how the structure performs during normal use.
A structural member may have enough strength but still perform poorly in service. For example, a beam may not fail under normal loads, but it may deflect too much. Excessive deflection can damage finishes, affect doors and windows, or make occupants feel uncomfortable.
Engineers therefore check deflection, vibration, cracking, and movement in addition to strength. These checks help ensure that a structure remains functional and comfortable throughout its service life.
A successful design must provide both safety and acceptable performance. Strength prevents collapse, while sufficient stiffness and proper detailing help control movement, cracking, and vibration.
⑧ 段落概括｜8分钟
第一段
段意：
结构设计必须同时满足强度和正常使用要求。
关键词：
strength / serviceability
第二段
段意：
构件即使不会破坏，也可能因挠度过大而影响使用。
关键词：
no failure / excessive deflection
第三段
段意：
工程师还需要检查挠度、振动、裂缝和位移。
关键词：
deflection / vibration / cracking
第四段
段意：
好的设计既要安全，也要保证可接受的使用性能。
关键词：
safety / acceptable performance
今日目标：
不看原文至少说出2个段意。
读完每段后，立即闭眼说一句中文概括。
⑨ 今日长难句解析
原句：
Although a structural member may have enough strength to resist failure, it can still perform poorly if its stiffness is insufficient.
第一步：找主句
It can still perform poorly.
主语：it
谓语：can perform
状态：poorly
这里 it 指：
a structural member
意思：
它的使用表现仍然可能不好。
第二步：Although部分
Although a structural member may have enough strength to resist failure
Although：
尽管、虽然
主干：
A member may have enough strength.
to resist failure 修饰 strength：
足以抵抗破坏的强度
第三步：if部分
if its stiffness is insufficient
意思：
如果它的刚度不足
its：它的，指构件的
stiffness：刚度
insufficient：不足的
意群划分
Although a structural member / may have enough strength / to resist failure, it can still perform poorly / if its stiffness is insufficient.
自然翻译
虽然结构构件可能具有足够的强度而不会发生破坏，但如果刚度不足，其正常使用表现仍然可能较差。
简化成三句
The member has enough strength. It may not fail. However, it may perform poorly because its stiffness is insufficient.
仿写
Although a beam may not fail, it can still experience excessive deflection.
中文：
虽然梁可能不会破坏，但仍可能产生过大挠度。
⑩ 阅读题 Part A
用完整英文回答。
Q1
What does structural strength relate to?
Q2
How may excessive deflection affect a building?
Q3
What do engineers check in addition to strength?
Q4
What must a successful design provide?
⑪ Rewrite｜2句
1
原句：
Structural design must satisfy both strength and serviceability requirements.
提示：
Both strength and serviceability…
2
原句：
Excessive deflection can damage finishes.
提示：
Finishes can…
⑫ Writing｜12分钟
任务一：纠错
Structural strength help members resist loads.
A flexible beam may deflects too much.
Engineers must checks serviceability.
Finishes can be damage by excessive movement.
答案
正确答案稍后再看：
Structural strength helps members resist loads.
A flexible beam may deflect too much.
Engineers must check serviceability.
Finishes can be damaged by excessive movement.
任务二：because
完成：
Engineers check deflection because ______.
参考
参考：
Engineers check deflection because excessive movement may affect serviceability.
任务三：although
合并：
A beam may have enough strength. It may still deflect too much.
参考
参考：
Although a beam may have enough strength, it may still deflect too much.
⑬ Shadowing｜20分钟
练习四句：
Structural design must satisfy strength and serviceability requirements.
Strength helps members resist loads without failure.
Sufficient stiffness helps control deflection and movement.
Engineers check both safety and performance during design.
意群划分
Structural design must satisfy / strength and serviceability requirements.
Strength helps members / resist loads / without failure.
Sufficient stiffness helps control / deflection and movement.
Engineers check / both safety and performance / during design.
Structural design must consider both strength and serviceability. A member may be strong enough to resist failure but still experience excessive movement. Engineers therefore check deflection, vibration, and cracking to ensure acceptable structural performance.
注意：
structural
serviceability
excessive
vibration
acceptable
performance
今天 Day 16 的 RA 没完成，所以 Day 17 至少完整读一遍并录音一次，不重来。
⑮ RS｜短句训练
今天6句都控制在6—8个词左右。
第一句
Strength helps prevent structural failure.
第二句
Stiffness helps control excessive deflection.
第三句
Engineers check movement during design.
第四句
Flexible beams may deflect too much.
第五句
Excessive movement can damage finishes.
第六句
Good design ensures acceptable performance.
第一轮：单遍裸听
每句只听1遍，立即说。
记录：
抓到关键词；
能说出主干；
基本完整。
例如第2句只能说：
Stiffness controls deflection.
已经算主干成功。
第二轮：学习模式
每句最多再听2遍。
按声音块练：
Stiffness helps control / excessive deflection.
Excessive movement / can damage finishes.
今日目标
抓关键词：至少3/6；
说出主干：至少2/6；
单遍基本完整：不强求；
学习后基本完整：至少4/6。
⑯ Speaking｜15分钟
主题
Why are strength and serviceability both important?
今天不直接逼自己看中文说完整句，而是逐层扩展。
第一句
主干
Design needs strength and serviceability.
完整句
Structural design needs both strength and serviceability.
第二句
主干
Strength prevents failure.
完整句
Structural strength helps prevent member failure.
第三句
主干
Stiffness controls deflection.
完整句
Sufficient stiffness helps control excessive deflection.
第四句
主干
Engineers check performance.
完整句
Engineers check structural performance during design.
最后看中文说
结构设计需要同时考虑强度和正常使用性能；
强度可以防止构件破坏；
刚度有助于控制过大挠度；
工程师在设计阶段检查结构性能。
今天只要能说出4个主干，再完整说出2—3句，就算达标。
⑰ 工程英语
1. structural strength
中文：结构强度
专业含义： 结构或构件抵抗荷载而不发生承载力破坏的能力。
常用搭配：
sufficient structural strength
strength requirement
strength check
例句：
The member must have sufficient structural strength. 构件必须具备足够的结构强度。
2. serviceability
中文：正常使用性能
专业含义： 结构在正常使用条件下满足变形、裂缝、振动、舒适度等要求的能力。
搭配：
serviceability requirement
serviceability limit state
satisfy serviceability requirements
例句：
The design must satisfy serviceability requirements. 设计必须满足正常使用要求。
3. vibration
中文：振动
搭配：
structural vibration
floor vibration
control vibration
例句：
Excessive floor vibration may make occupants uncomfortable. 过大的楼面振动可能使使用者感到不适。
4. cracking
中文：开裂、裂缝发展
搭配：
control cracking
concrete cracking
excessive cracking
例句：
Proper reinforcement can help control concrete cracking. 合理配筋有助于控制混凝土开裂。
5. service life
中文：使用寿命
搭配：
design service life
throughout its service life
extend service life
例句：
The structure should remain functional throughout its service life. 结构在整个使用寿命内都应保持正常功能。
⑱ 今日重点激活5词
structural strength
serviceability
vibration
cracking
service life
读熟：
Structural strength prevents failure.
The design must satisfy serviceability requirements.
Engineers check vibration and movement.
Proper detailing helps control cracking.
The structure should perform well throughout its service life.
