And a meteoroid coming in at hypersonic speeds compresses the air in front of it a lot, heating it hugely.

一个流星体以高超音速飞来，会对它前面的空气进行很大的压缩，使其大幅升温。

This eliminates air friction, allowing hypersonic speeds to be reached.

这消除了空气摩擦，可以达到高超音速。