扣的用法和样例：
例句
-
他把裤带扣得紧紧的。
He buckled up his belt tightly. -
你的一个扣子松开了。
One of your buttons is undone. -
请你在这件衬衫上钉一颗钮扣好吗？
Will you stitch a button on this shirt? -
我用手帕把钮扣擦亮。
I polished my buttons with a handkerchief. -
请你把这颗纽扣缝到我的衬衫上好吗？
Would you sew this button onto my shirt? -
我的裙子是背后扣扣子的。
My skirt buttons at the back. -
我上衣上的一颗扣子掉了。
One of the buttons has come off my coat.
