turn in
phrasal verbturn in
- to face the centre or move towards the centre in a curve
朝内；向内拐 - Her feet turn in.
她的两脚呈内八字。
- Her feet turn in.
- (old-fashioned) to go to bed
上床睡觉 - It’s late—I think I’ll turn in.
不早了，我该睡觉去了。
- It’s late—I think I’ll turn in.
turn somebody in
- (informal) to take somebody to the police or somebody in authority because they have committed a crime
把…扭送（到警察局）；使自首 - She threatened to turn him in to the police.
她扬言要把他交给警方。 - He decided to turn himself in.
他决定到警察局去自首。
- She threatened to turn him in to the police.
turn something in
- to give back something that you no longer need
交还，退还（不再需要的东西） - You must turn in your pass when you leave the building.
你离开大楼时必须交还通行证。
- You must turn in your pass when you leave the building.
- (especially North American English) to give something to somebody in authority
上交；呈交；提交 - They turned in a petition with 80 000 signatures.
他们递交了一份有 8 万人签名的请愿书。 - I haven't even turned in Monday's work yet.
我连星期一的作业还没交呢。
- They turned in a petition with 80 000 signatures.
- to achieve a score, performance, profit, etc.
取得（分数）；完成（表演）；获得（利润） - The champion turned in a superb performance to retain her title.
上届冠军表现十分出色，卫冕成功。
- The champion turned in a superb performance to retain her title.