例文
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- The pentachoron is a four dimensional pyramid with a tetrahedral base.
- Let us consider a four dimensional system of coordinates.
- Therefore, there are two commuting subgroups of the set of four dimensional rotations.
- I suppose 50 to a hundred years from now common usage will usually reflect four dimensional thinking.
- Consider gravity defined on a compact region of spacetime, with the topology of a four dimensional ball.