Inhibition of the parasympathetic system can therefore also cause dilation .

抑制副交感神经系统能够导致瞳孔扩张。

During a migraine attack , a number of changes occur throughout the brain causing dilation of blood vessels ; severe pain ; increased sensitivity to lights , sounds and smells ; nausea and vomiting ; and other symptoms .

当它发作的时候，大脑会发生一系列变化引起血管膨胀，剧烈疼痛，对光、声音和气味敏感，恶心呕吐等症状。

The dilation began about one second before they pressed the button and peaked one to two seconds after .

瞳孔在他们按下按钮之前1秒开始扩张、在之后的1到2秒后达到峰值。

The dilation of the vessels to compensate then led to the throbbing pain , so the thinking went .

血管的补偿性扩张就导致了搏动痛，当时的人们就是这么想的。

After drinking green tea , the subjects experienced significantly increased artery widening ( dilation ) , with the highest increase noted at 30 minutes .

饮用绿茶以后，受试者出现了明显的动脉变宽（扩张），显著的极大的增高有30分钟。