1. I paid him back in his own coin .
- "Pay someone back in someone's own coin" : Ăn miếng trả miếng.
2. The black rhino is threatened with extinction.
- N + be threatened with extinction : Cái gì đó bị đe dọa sẽ bị tuyệt chủng.
3. He finally got into the swing of the new working condition.
- S...