题目内容：

英语翻译
Then one day Rontgen noticed that,even when the tube was covered with black paper,some strange kind of radiation was coming through and making a screen nearby glow.
X-RAYS中的一句,

优质解答

然后有一天栾琴注意到即使试管盖上了黑纸,有某种奇怪的辐射穿过并发光.