偶然发现

I came across these old photos recently.

最近我然发现了这些旧照片。

He happened on the book in a secondhand bookstore.

他在旧书然发现了这本书。

Fleming discovered penicillin by accident in 1928.

弗莱明在1928年然发现了青霉素。

In 1895, Wilhelm Roentgen accidentally discovered that a cathode-ray tube could make a sheet of paper coated with barium platinocyanide glow, even when the tube and the paper were in separate rooms.

1895年，威廉·伦琴然发现阴射线管能使涂有一层氰亚铂酸盐钡的薄发光，甚至当阴射线管和别放在不同的房间时也能发光。