空穴和电子均可在其内部运动。
一个物体即使其内部运动无法看到,却可能是热的。
An object may be hot without the motion in it being visible.
把光子理解为一个电磁模的元激发,光子亦具有内部运动。
A photon is explained as an exciton of the electromagnetic mode, and the photon has an internal motion.
But outside of that, we have a large intramural sport team.
除此之外,我们还有一个大型的内部运动团队。
Can you explain what intramural sports are?
你能解释一下什么是内部体育运动吗?
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