there's white space around what they have to say.
他们不得不说的还是有空白。
Likewise, when in outer space, when you are orbiting the Earth, people are always floating around in these space stations.
就好比在外太空,当你在绕地球运行时,宇航员总是悬浮在太空站
They can click on the particle and move it around in this 3D space.
学生可以在物质上点一下,然后让它动起来,在这个3D空间里。
So just a dot, and the dot can move around all over space.
就是一个点,这个点能在空间各处自由运动
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