Trapezidal thread
[机] 梯形螺纹
🧩 词语组成解析
[机] 梯形的
thread
[θrɛd]
n. 线;线索;线状物;螺纹;
vt. 穿成串;将（针、线等）穿过…;用…线缝;给…装入（胶片、狭带、绳子）;
🗣️ 情景例句
Nowadays more and more people are without jobs.
现在越来越多的人失业。
Eat to please thyself, but dress to please others.
吃是使自己受用，穿是使别人受用。
Why not?
为什么不去？