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有一种更小的星际碎片，是流星体。 An even smaller type of interplanetary debris is the meteoroid. | ||
我们从流星体中得到流星和陨石。 It's from meteoroids that we get meteors and meteorites. | ||
宇航服的外层能够防御太阳辐射和高速微流星体造成的伤害。微流星体是指太空中的微小尘粒。 The outer layers of space suit protect against harmful radiation from the Sun and bullet-fast particles of space dust called micrometeoroids. | ||
那么讲到流星体从何而来，我们就需要讨论下彗星和小行星。 So to talk about where meteorites come from, we need to talk about comets and asteroids. | ||
水手号宇宙飞船发现火星表面，还有它的两个卫星表面，都有由太空坠落的流星体造成的陨石坑。 The Mariner spacecraft found that the surface of Mars, as well as that of its two moons, is pitted with impact craters formed by meteoroids falling in from space. | ||
太阳是一个巨大的旋转系统的中心，这个旋转系统由九大行星、它们的卫星和无数的小天体组成，包括小行星、彗星和流星体。 The Sun is the hub of a huge rotating system consisting of nine planets, their satellites, and numerous small bodies, including asteroids, comets, and meteoroids. | ||
类似于英仙座流星雨，猎户座流星雨以及其他流星雨，狮子座流星雨发生于地球在绕太阳公转过程中进入充满彗星碎片的流星体质点溪流之中。 Like other meteor showers, such as the Perseids and the Orionids, the Leonids happen when Earth plows through a trail of debris left in the wake of a comet orbiting the sun. | ||
