diffusion analogy

• 扩散比拟

diffusion analogy的用法和样例：

例句

1. Beyond that, the analogy is far from exact.
   除了这点之外，这比拟很不确切。
2. As a mechanical analogy, We can think of pebbles dislodged from a beach by water waves.
   作为一种力学比拟，我们可以想象海滩上被水波移动的卵石。