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 sold your father that house seventeen years ago.
十七年前我把那栋房子卖给你父亲的。
The shortest answer is doing.
最简短的回答是做。
They would have continued to struggle against economic odds and would have lived in obscurity.
这家人会继续为克服经济上的拮据而奋斗，并默默无闻地活下去。