turning in

1.内旋

1.to return something to the person it belongs to, especially something that was lost or was lent to you

2.to give something to the person who has officially asked for it or who is in charge

3.to tell the police about someone, or to take them to the police, because they have committed a crime

4.to produce a particular amount or degree of something

5.to go to bed at night

6.to point or be directed inward, or to make something do this