an action or a piece of work that needs skill, strength or courage 技艺；武艺；功绩；英勇事迹
The tunnel is a brilliant feat of engineering.
这条隧道是工程方面的光辉业绩。
to perform/attempt/achieve astonishing feats
表演惊人的技艺；争取／取得惊人的功绩
That was no mean feat (= it was difficult to do).
那是伟大的成就。