V-ERG
(使)(血管)擴(kuò)張;(使)(瞳孔)放大
When things such as blood vessels or the pupils of your eyes dilate or when something dilates them, they become wider or bigger.
例句
At night, the pupils dilate to allow in more light...
到了晚上，瞳孔就會(huì)擴(kuò)大以接收更多光線。
Exercise dilates blood vessels on the surface of the brain.
運(yùn)動(dòng)會(huì)使大腦表層的血管擴(kuò)張。