例句：

　　Several years after they'd split up they met again by chance in Paris.

　　他們分手幾年以后在巴黎又偶然相遇。

　　She discovered the problem by accident during a visit to a nearby school.

　　她在去附近一所學校參觀時偶然發(fā)現了這個問題。

　　As luck would have it, he had just left when I arrived.

　　我到那兒，不巧他剛走。

　　As it happens, I have a spare set of keys in my office.

　　碰巧我在辦公室有一套備用鑰匙。