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
By arranging with the public schools
首先， 从公立学校开始
All right. I will send the information on a piecemeal basis as we acquire it.
好。我们收齐之后会立即寄给你。
When she caught up with them, she saw that they had sat down and were going through the contents of the bag,
当她赶上他们时，发现他们已经坐了下来，正翻着包里的东西。