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V-T/V-I When things such as blood vessels or the pupils of your eyes dilate or when something dilates them, they become wider or bigger. 使扩大; 扩大
At night, the pupils dilate to allow in more light.
晚上，瞳孔放大以便让更多的光线射入。
dilated ADJ 扩大的
His eyes seemed slightly dilated.
他的双眼瞳孔似乎稍微扩大了些。
But it should be a thorough exam in which the doctor dilates the pupils and examines the optic nerve.
但是，那应该是一次彻底的检查，医生应该为孩子扩瞳检查视神经。
Alcohol dilates our blood vessels, forcing our blood closer to the surface of our skin and closer to the nerve receptors — that's the feeling part.
酒精扩大了我们的血管，促使血液贴近皮肤表层和神经末梢——即感觉区。
That's why red wine is also a trigger. It contains tyramine and also it dilates blood vessels in the brain which can actually compound the problem.
这也是为什么红酒也会引发头痛，红酒也含有酪胺，而同时红酒还有扩张大脑血管的功能，这也会加重头痛。
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