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
Number 1 train to Van Cortlandt Park. Thank you.
一路车到Van Cortlandt公园。谢谢。
One half of the world does not know how the other half lives.
贫富不相知。
I am looking forward to your visit next week.
我期待着你下周来访。