by chance

    　英 [baɪ tʃɑːns]   美 [baɪ tʃæns]

    　偶然，碰巧;意外地

    　例句

    　I saw the letter purely by chance.

    　我看见这封信纯属偶然。

    　I met him by chance out walking yesterday

    　我昨天外出散步时碰巧遇见了他。

    　Although we have only met by chance, I can see you are a very remarkable girl with a clear purpose in life.

    　虽然我们萍水相逢，可是我觉得你是个了不起的有志气的姑娘。