let up

名词 let up:

1. a pause during which things are calm or activities are diminished
   同义词：letup, lull

动词 let up:

1. become less in amount or intensity
   同义词：abate, slack off, slack, die away
2. reduce pressure or intensity
   同义词：ease up, ease off

1. He refused to let up on the boy until his school grades improved.
   直到那孩子学业有了进步他才肯放宽他对他的管束。
2. Let up for a minute. You can't work hard all day.
   暂停一会儿，你不能整天都拼命工作。