ADJ 与…成比例的 If one amount is proportional to another, the two amounts increase and decrease at the same rate so there is always the same relationship between them. 与…成比例的 [formal]
Loss of weight is directly proportional to the rate at which the disease is progressing. [+ to]
体重的下降与病情发展的速度成正比。
...a proportional fee based on the final sale price.