pupil dilates 瞳孔扩张
blood vessels dilate 血管扩张
cervix dilates 宫颈扩张
dilate the eyes 使眼睛放大
dilate pupils 瞳孔放大
dilate gradually 逐渐扩张
A: Why do our pupils dilates in the dark?
A：为什么我们的瞳孔在黑暗中会扩张？
B: Because the eyes dilates to let in more light.
B：因为眼睛会扩张以吸收更多光线。
1) 指器官或管道扩大或变宽
2) 医学中常用于描述瞳孔或血管变化
3) 也可用于描述扩展或延伸的动作
1. （使）扩大；（使）扩张
2. 指血管或管道变宽
verb
1. to make or become wider or larger, especially referring to blood vessels, pupils, or bodily openings.
Synonym: expand, widen