名詞 sit up:

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

動詞 sit up:

1. not go to bed
   同義詞：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.
   他花了很長時間才教會狗坐立起來討食。
2. George's sudden success made the town sit up and take notice.
   喬治的突然成功使全城大的為吃驚。
3. She may be the Warden, but we pay for her services so why should we sit up and beg?
   她可能是管理員，但我們是付她勞務費的，因此我們?yōu)槭裁匆懞盟兀?/div>
4. I called her a damned hypocrite and that made her sit up.
   我罵她惺惺作態(tài)，她馬上警覺起來。