Classes can be composed of classes which themselves have parts, allowing you to hierarchically decompose a system to any arbitrary level.
类可以由那些拥有部件的类组成，允许您按照层级结构将一个系统逐步分解成任意的层次。
All matter is composed of tiny particles called atoms, which are themselves composed of smaller particles, electrons, neutrons and protons.
所有的物质都是由称之为原子的微粒组成，而原子本身则由更小的微粒，电子、中子和质子所组成。
Those molecules themselves are composed of smaller particles that have positive and negative charges of electricity.
那些分子本身是由若干更小的带有正负电荷的微粒所组成的。
ONE sit atop a high podium, like a huge camera, taking urban scenes into their viewfinder, and building various scenes composed of themselves.
ONE的台阶在一个高台上，像一个巨大的相机，将城市的景色收纳到它的取景器中，也建立了由它组成的各种景色。
What was their disappointment, when, after trudging nearly two miles, having reached an elevated point composed of slippery rocks, they found themselves again stopped by the sea.
走了差不多两英里以后，到了一个高耸的地岬上，遍地都是又湿又滑的岩石，又被海水阻挡住了，他们不禁大失所望。
What was their disappointment, when, after trudging nearly two miles, having reached an elevated point composed of slippery rocks, they found themselves again stopped by the sea.
走了差不多两英里以后，到了一个高耸的地岬上，遍地都是又湿又滑的岩石，又被海水阻挡住了，他们不禁大失所望。
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