These planets and their surfaces may be heavily modified by the last, big collision they experience (e.g. the largely metal composition of Mercury or the Moon).

这些行星最近所经历的大碰撞，会改变他们和他们的表面。

The paper introduces the composition and the working axiom of rainbow metal roof's make-up machine, and the working axiom of the hydraulic system.

介绍了彩虹金属屋顶成型机的构成、工作原理，通过系统原理图介绍了液压驱动系统的组成、工作原理及特点。

The sculpture composition at the base of the monument was painted overnight to turn the metal soldiers into well-known pop culture icons;

纪念碑底座上的雕像经过连夜创作，原来那一个个钢铁士兵都改头换面成了尽人皆知的流行文化人物。