1·The largest asteroid is Ceres, which is about a quarter the size of the moon.
最大的小行星是谷神星，其体积大约是月球的四分之一。
—— 《柯林斯英汉双解大词典》
2·In this case, the orbit of the rotating asteroid will very slowly spiral toward the sun.
在这种情况下，旋转小行星的轨道将非常缓慢地向太阳旋转。
3·Some scientists hypothesize that the extinction of the dinosaurs resulted from the effects of an asteroid collision with Earth.
一些科学家假定，小行星撞击地球导致了恐龙的灭绝。
4·Skeptics have argued that a single impact would raise an asteroid's overall temperature very little and that asteroids would cool too quickly between impacts to accumulate much heat.
怀疑派认为，一次撞击只会使小行星的整体温度上升很小，而且小行星在两次撞击之间会迅速冷却，从而无法积聚大量热量。
5·Paradoxically, while the temperatures required for liquid water exist only in the inner solar system, the key building blocks of life, including water itself, occur primarily beyond the asteroid belt.
矛盾的是，虽然液态水所需的温度只存在于太阳系内部，但生命的关键组成部分，包括水本身，却主要存在于小行星带之外。