Carry coals to Newcastle
To take something to a place that already has plenty of it.
English
Carry coals to Newcastle
Tiếng Việt
Chở củi về rừng.
Mang thứ gì đến nơi đã có sẵn thứ đó.
Ví dụ
- Bringing wine to a vineyard is carrying coals to Newcastle.
- He offered to teach them fishing, which was carrying coals to Newcastle.