问题描述：
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,
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,
问题解答：
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