Asteroids are rocky bodies up to about 1,000 kilometres in diameter, although most are much smaller.

小行星是岩石体，直径可以达到约1,000公里，虽然大多数小行星要小得多。

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Asteroids are rocky bodies up to about 1,000 kilometres in diameter, although most are much smaller.

小行星是岩石体，直径可以达到约1,000公里，虽然大多数小行星要小得多。

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