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
We feel this is a super place to live.
我们觉得住在这里真是好极了。
Kept waving to her mother until the train was out of sight.
不断地冲她的母亲挥手，直到火车驶出了视线。
The plane wasn't too badly damaged, but over the years, the crash was forgotten and the wreck remained undisturbed.
飞机损坏的程度并不严重，但是，多年来这起飞机失事已被遗忘，飞机残骸也没受到破坏。