·2,447,543篇论文数据，部分数据来源于NoteExpress
The next thing he found out was that if he put his hand between the rays and a photographic plate, the rays could print a shadow of a bony framework of his hand on the plate.
接下来他又发现，如果他把他的手放在这种射线和照相的底片之间，这种射线可以使他手的骨架在底片上形成一个影子。
youdao
应用推荐
模块上移
模块下移
不移动