Do's and don’ts 规则；注意事项
Before you begin your first day working for us, there are a few important do's and don'ts that I need you to be familar with.
What's done is done 事已至此
It's too late to change it now. What's done is done.
Make do 凑合；将就
I really need a large frying pan but if you haven’t got one I’ll have to make do with that small one.
Do the trick 奏效，起作用
The recipe calls for pancetta /pænˈtʃetə/, but I think this regular bacon should do the trick.
Do a double take
Everyone did a double take at his shiny new sports car as he drove by.