Flex stiffness
[化] 耐屈挠疲劳
🧩 词语组成解析
flex
[fleks]
v. 弯曲（关节）;收缩（肌肉）;显示力量;
n. 弯曲;[电]花线;
🗣️ 情景例句
I've got it!
有啦！
That's really something.
真了不起。
The boy was too nervous to speak.
那男孩紧张得说不出话来。