One day he chanced upon Emma's diary and began reading it.
有一天他偶然发现了埃玛的日记，便开始读了起来。
I chanced upon this book in a small bookstore.
我在一个小书店里偶然发现了这本书。
I chanced upon a friend of yours in the library.
我在图书馆里碰巧遇到你的一个朋友。
I chanced upon this old photograph in the back of the drawer.
我偶然在抽屉后部发现了这张旧照片。
I chanced upon this old photograph in the back of the drawer.
我偶然在抽屉后部发现了这张旧照片。
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