by chance 偶然地；碰巧地

大家可以这样记忆：碰巧有一个机会做的事情，就是“偶然地；碰巧地”意思啦。

【例句】

I found this old photo by chance when I was looking for something else.

我在找其他东西的时候碰巧找到了这张旧照片。

We heard about it quite by chance, from someone in the shop.

我们碰巧从店里的一个人那里听说了这件事。 

【问题】

I found this old photo by chance when I was looking for something else.

把chance替换成另外一个单词，也可以表达同样的意思哦~~那个单词是什么呢？

答案：accident