late 15c., from ah, lack, from lack in Middle English sense of "loss, failure, reproach, shame." Originally an expression of dissatisfaction, later of regret or unpleasant surprise.
双语例句
1. Alas and alack , we had missed our bus.
唉，完了，我们没赶上公共汽车。
来自《权威词典》
2. Long ago I had a heart, and sighed alas ! alack!
