Checknut
防松螺母, 保险螺帽, 锁紧螺母
🗣️ 情景例句
May I see the mirror, please?
我可以照照镜子吗？
That's a book.
那是一本书。
I thought I put it in my coat, but it isn't here!
我想我把它放在大衣里，可现在不见了！