Buttless thread
[机] 锯齿形螺纹
🧩 词语组成解析
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
Some people don't mind being alone. I do.
有些人不在乎独自生活。 我在乎。
May I accompany you tonight?
今晚我可以和你在一起吗？
Since its discovery, it has become a sort of potholers' Everest.
自从被发现以后，这个洞成了洞穴探险者的珠穆朗玛峰，