Palnut
一种单线螺纹锁紧螺母
🗣️ 情景例句
I kissed the top of his dear little head.
我吻着他可爱的小头顶。
The sewing machine is out of order.
这缝纫机坏了。
It is good preparation for the world outside schools and universities.
这对走出学校进入社会是一个良好的准备。