alas是什么意思

int.唉

1、Alas, I missed the train and now I have to wait for the next one.
哎呀，我错过了火车，现在只能等下一班了。
2、He won't be able to come to the party, alas, his mother is ill.
不幸的是，他不能来参加派对了，因为他妈妈病了。

（表示悲伤、遗憾等的）哎呀！唉，可惜；恐怕，很不幸