副詞 by chance:

1. in an incidental manner
   同義詞：incidentally, accidentally
2. through chance, "To sleep, perchance to dream.."
   同義詞：perchance
3. by accident
   同義詞：haply, by luck
4. without advance planning
   同義詞：accidentally, circumstantially, unexpectedly

1. I met her quite by chance.
   我遇見她完全是偶然的。
2. Occurring by chance; fortuitous.
   僥幸的碰巧發(fā)生的，幸運的
3. We met (each other) quite by chance.
   我們(彼此)相遇純屬偶然。
4. He had a slip of tongue by chance.
   他偶然說走嘴。
5. She tried to commit suicide, but we saved her life by chance.
   她試圖自殺，但我們碰巧救了她。