“扣扣子”用英文怎么说?button作名词是扣子,作动词就是扣上扣子
button v. /ˈbʌt.ən/
to fasten something, usually a piece of clothing, using buttons
扣上(…的)纽扣
例:
Button (up) your coat, it s cold outside.
把大衣扣上,外面很冷。
button up: 从下往上扣
button down: 从上往下扣
“拉拉链”用英文怎么说?zip v. /zɪp/ 
to fasten something with a zip
拉上(…的)拉链
例:
This bag s too full, I can t zip it shut. 
这包装得太满,拉链都拉不上了。
This dress zips (up) at the back. 
这件连衣裙的拉链在背部。
Zip your coat up, it s cold outside. 
把外套的拉链拉上,外面很冷。