Length of thread engagement
[化] 螺纹啮合长度
🧩 词语组成解析
of
[əv]
prep. 关于;属于…的;由…制成;
aux. 助动词 [非标准用语、方言] =have [主用于虚拟语气];
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）;
engagement
[ɪn'ɡedʒmənt]
n. 订婚，婚约;约会;约定，契约;雇用;
en 进入 +gage约定+ment 表名词 → n.约会,预约;(演员等的)约请,受聘(期);订婚,婚约
🗣️ 情景例句
I feel sorry for the beggars, but I can't stand it when they teach their children how to beg.
我很同情乞丐，但我真的看不惯他们教孩子怎么样行乞。
I want to extend my warmest welcome to all of you.
热烈欢迎大家。
Thanks to space satellites, the world itself is becoming a much smaller place and people from different countries now understand each other better.
由于有了宇宙卫星，世界在变得小多了，来自不同国家的人现在彼此更了解了。