1. For identical shapes, the stiffness is proportional to the modulus of elasticity. 对于同样形状的材料，刚度与弹性模量是成比例的。
2. Travel is expected; it is not proportional to the distance, but to the moods of expectation. 旅行是充满期待的；它不以距离成正比，而以期待时的心情成正比。
3. In the simplest case, where space has no hidden dimensions or those dimensions are smaller than the hole, its size is directly proportional to its mass. 考虑最简单的状况，其中的空间没有隐藏的维度，或是隐藏维度比黑洞小，那麽黑洞的半径会直接与质量成正比。
英英解释
n.
1. one of the quantities in a mathematical proportion
2. properly related in size or degree or other measurable characteristics; usually followed by `to'
3. (of taxes) increasing as the amount taxed increases
4. having a constant ratio
网络释义
proportional 成比例;
成比例的，相称的，比例数;
比例的;
成比例的;
proportional control 比例控制;
线性控制;
比例调节;
比例[调辐]控制;
proportional band 线性范围;
比例带;
比例范围;
正比区;
proportional controller 比例控制器;
比例调节器;
P控制器;
P 控制器;
