成正比 be directly proportional; direct proportion
- 油门的立场是成正比的立场需求。
Throttle position is proportional to the position demand. - 它的宽度与人生的喜乐程度成正比。
Its width form direct ratio with the charmed degree of life. - 使物体运动的力与物体质量成正比.
The force moving a body is proportional to the mass of the body.