趣英语 / ejection造句

ejection造句

Radioactivity is the ejection of particles or radiation from the nucleus.
放射性是原子从核中射出粒子或辐射的现象.

Most of the crater is formed by ejection.
大多数的弹坑是由于把泥土抛出而形成的.

A rocket is propelled by the ejection of a portion of its mass to the rear.
火箭是靠向后喷射其部分质量而推进的.

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