sit up

名词 sit up:

1. an stomach exercise in which a person sits up from a supine position without using the arms for leverage
   同义词：sit-up

动词 sit up:

1. not go to bed
   同义词：stay up
2. change to an upright sitting position

1. It took him a long time to teach the dog to sit up and beg.
   他花了很长时间才教会狗坐立起来讨食。
2. George's sudden success made the town sit up and take notice.
   乔治的突然成功使全城大的为吃惊。
3. She may be the Warden, but we pay for her services so why should we sit up and beg?
   她可能是管理员，但我们是付她劳务费的，因此我们为什么要讨好她呢？
4. I called her a damned hypocrite and that made her sit up.
   我骂她惺惺作态，她马上警觉起来。