a.[Z]

1. 比例的，成比例的[（+to）]
   The output should be proportional to the input.

   产出应和产入成比例。

2. 均衡的，相称的
3. 【数】成常比的

n.

1. 【数】比例项[C]

adj.

1. corresponding in size or amount to something else.
2. Mathematics  (of a variable quantity) having a constant ratio to another quantity.