at one stroke的用法和樣例：
例句
- Spectators cheered at his KO punch.
觀眾為他擊倒對手的一擊而喝采。 - He dispatched the bear with one blow on the head.
他給那隻熊當頭一擊把它打死。 - He rallied all his energy for one last effort.
他重鼓勇氣作最後一舉。 - They have decided to cut the Gordian knot to wipe out the enemy at a blow.
他們決定快刀斬亂麻，一舉把敵人消滅掉。 - She solved the problem at a stroke.
她一下子解決了問題。 - He beat his opponent at one bout.
他一下子就打敗了對手。
