循环

In a sentence

• 太阳系中的行星按照一定的轨道循环运行。

  The planets in the solar system orbit cyclically along defined paths.

  Here, '循环' refers to the periodic or repeating nature of the motion.

• 生活中的许多事情往往是一个循环的过程。

  Many things in life are often cyclic processes.

  In this sentence, '循环' denotes the recurring or iterative nature of processes or events.

• 循环利用资源可以有效降低对环境的影响。

  Recycling resources can effectively reduce the impact on the environment.

  Here, '循环' is part of the phrase '循环利用' (recycling), indicating the repeated usage of resources for sustainability.