a :to complete (a document) by providing necessary information填写
fill in an application填写申请表
fill in an order form填写订单
Please fill in the blanks. [=put information in the blank spaces]请填空。
— sometimes used figuratively有时用作比喻
At the end of the movie, the narrator goes back and fills in (all) the blanks. [=the narrator provides missing information about the movie's plot]在电影结尾时,叙述者回溯到过去,揭晓了情节中留下的(所有)悬念。
b :to provide (more information)提供(详情)
Just tell me the most important parts—you can fill in the details later.告诉我最重要的部分就行——详情可以以后补上。
2
fill (someone) inorfill in (someone):to provide information to (someone)向(某人)提供信息
I missed the meeting so I need someone to fill me in (on what happened).我没参加会议,因此需要有人告诉我会议的情况。
She filled us in on the details.她把详情告诉了我们。
3
fill in:to take the place of (someone who is away for a time)临时补缺
He can't be here today, so he asked me to fill in.他今天来不了,所以让我来替他。