回复
-
宛家豪
-
董佳卓
-
董佳卓
-
用户663443
-
用户663290
-
张澎渤
-
宋绘威
-
用户672637
-
用户672637
-
用户663288'It is simply this. That Space, as our mathematicians have it, is spoken of as having three dimensions, which one may call Length, Breadth, and Thickness, and is always definable by reference to three planes, each at right angles to the others. But some philosophical people have been asking why three dimensions particularly—why not another direction at right angles to the other three?—and have even tried to construct a Four-Dimension geometry.