coals to Newcastle
徒勞無功的行為
口語·表示多此一舉或徒勞無功
英文釋義
to do or bring something that is unnecessary or redundant
例句
Bringing ice to Antarctica is like coals to Newcastle—completely unnecessary.
典故來源
源自英國紐卡斯爾是著名的煤炭產地,向該地運煤純屬多余,比喻做徒勞或多余的事。