He happened on the book in a secondhand bookstore.

他在旧书店里偶然发现了这本书。

I came across these old photos recently.

最近我偶然发现了这些旧照片。

Fleming discovered penicillin by accident in 1928.

弗莱明在1928年偶然发现了青霉素。

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·伦琴偶然发现阴射线管能使涂有一层氰亚铂酸盐钡的薄相纸发光，甚至当阴射线管和相纸分别放在不同的房间时也能发光。

He happened on the book in a secondhand bookstore.

他店里偶然发现了这本。

I came across these old photos recently.

最近我偶然发现了这些照片。

Fleming discovered penicillin by accident in 1928.

弗莱1928年偶然发现了青霉素。

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·伦琴偶然发现阴射线管能使涂有一层氰亚铂酸盐钡的薄相纸发光，甚至当阴射线管和相纸分别放不同的房间时也能发光。

He happened on the book in a secondhand bookstore.

他在旧书店里偶然发现了这本书。

I came across these old photos recently.

最近我偶然发现了这些旧照片。

Fleming discovered penicillin by accident in 1928.

弗莱明在1928年偶然发现了青霉素。

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·伦琴偶然发现阴射线管能使涂有一层氰亚铂酸盐钡的薄相纸发光，甚至当阴射线管和相纸分别放在不同的房间时也能发光。

He happened on the book in a secondhand bookstore.

他在旧书店里偶了这本书。

I came across these old photos recently.

最近我偶了这些旧照片。

Fleming discovered penicillin by accident in 1928.

弗莱明在1928年偶了青霉素。

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·伦琴偶阴射线管能使涂有一层氰亚铂酸盐相纸光，甚至当阴射线管和相纸分别放在不同房间时也能光。

He happened on the book in a secondhand bookstore.

他在旧书店里现了这本书。

I came across these old photos recently.

最近我现了这些旧照片。

Fleming discovered penicillin by accident in 1928.

弗莱明在1928年现了青霉素。

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·伦琴现阴射线管能使涂有一层氰亚铂酸盐钡的薄光，甚至当阴射线管和别放在不同的房间时也能光。

He happened on the book in a secondhand bookstore.

他在旧书店里偶了这本书。

I came across these old photos recently.

最近我偶了这些旧照片。

Fleming discovered penicillin by accident in 1928.

弗莱明在1928年偶了青霉素。

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·伦琴偶阴射线管能使涂有一层氰亚铂酸盐钡的薄光，甚至当阴射线管分别放在不同的房间时也能光。

He happened on the book in a secondhand bookstore.

他在书店里偶然发现了本书。

I came across these old photos recently.

最近我偶然发现了照片。

Fleming discovered penicillin by accident in 1928.

弗莱明在1928年偶然发现了青霉素。

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·伦琴偶然发现阴管能使涂有一层氰亚铂酸盐钡的薄相纸发光，甚至当阴管和相纸分别放在不同的房间时也能发光。

He happened on the book in a secondhand bookstore.

他在书店里偶然发现了这本书。

I came across these old photos recently.

最近我偶然发现了这些。

Fleming discovered penicillin by accident in 1928.

弗莱明在1928年偶然发现了青霉素。

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·伦琴偶然发现射线管能使涂有一层氰亚铂酸盐钡的薄相纸发光，甚至射线管和相纸分别放在不同的房间时也能发光。

He happened on the book in a secondhand bookstore.

他在旧书店里偶然发现了这本书。

I came across these old photos recently.

最近我偶然发现了这些旧照片。

Fleming discovered penicillin by accident in 1928.

弗莱明在1928年偶然发现了青霉素。

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，·琴偶然发现阴射线管能使涂有氰亚铂酸盐钡的薄相纸发光，甚至当阴射线管和相纸分别放在不同的房间时也能发光。