Lockstitching
(lockstitch 的现在分词) n. 双线连锁缝法
🗣️ 情景例句
She takes her exams next week, so she's burning the midnight oil.
她下周要考试，所以在开夜车。
The shore man is carrying a heavy load.
码头工人在搬运沉重的东西。
What are these?
这些是什么啊？