analogy

The teacher used the analogy of a pump to explain how the human heart works.

(Chinese) 老师用泵来类比，解释人类心脏是如何工作的。

There is a close analogy between the structure of a leaf and the structure of a solar panel.

(Chinese) 叶子的结构与太阳能电池板的结构之间存在紧密的类比关系。