Palnut
一种单线螺纹锁紧螺母
🗣️ 情景例句
To help scrub the building interior clean.
帮忙把建筑的内部擦洗干 。
Who rang the bell a while ago?
刚才谁在按门铃？
He insisted on the assistant's counting the money before he left -- 30,000 pennies in all!
这些硬币加在一起共有30，000枚！