Depth of thread
[化] 螺纹深度
🧩 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）;
🗣️ 情景例句
I used to stop for hitch-hikers'till the day I picked up that maniac.
自从有一天搭了一个精神病人以后，我碰到搭顺风车的人就不再停下来了。
Beauty is but skin-deep.
红颜易变。
In the letter he was asked to call at the station.
要他到警察局去一趟。