dilates例句

Gas dilates the balloon.
气体使汽球膨胀.

Exercise dilates blood vessels on the surface of the brain.
运动会使大脑表层的血管扩张。

The pupil of the eye dilates and contracts in response to light.
作为对光线作出的反应,眼睛的瞳孔会放大或缩小.