X-rays were first discovered by a German scientist,Wilhelm Conrad roentgen,in 1895,almost by accident.
X射线最初是在1895年被一个德国科学家偶然地发现的，他的名字叫WilhelmConradroentgen.
Roentgen discovered X - rays; Darwin found many new species on the Galapagos Islands.
伦琴发现了x射线； 这里发现了很多古物。
William Roentgen discovered X - rays.
威廉？伦琴发现了x射线。
Whilhelm Roentgen discovered X rays.
威尔海尔姆·伦琴发现了X射线。
Whilhelm Roentgen discovered X rays.
威尔海尔姆·伦琴发现了X射线。
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