The caffeine restricts the flow of blood to the brain, so as soon as you stop drinking it, you get a rush of blood.

咖啡因会限制血液流向大脑，所以一旦停止饮用，就会出现血流。

Similarly, during a brain freeze, blood vessels in your brain widen sending a rush of blood to the roof of your mouth and, in the process, causing pain.

类似的，你在经历冰淇淋头痛的时候，大脑中的血管扩张，让血液涌至你的口腔上部，这个过程就会造成疼痛。

When this right ventricle contracts, it forces the pulmonary semilunar valve to open, allowing a rush of blood into the pulmonary trunk, which is the large artery that leaves the right ventricle.

右心室收缩时，它会迫使肺半月瓣打开，从而使血液涌入肺动脉，后者是离开右心室的大动脉。

She bit her lips, and a rush of blood flowing under her skin made her red from the roots of her hair to the top of her collar. She remained standing, leaning with her shoulder against the wainscot.

她咬咬嘴唇，血像潮水似的往上涌。 她脸红了，从头发根部到衣领边上，皮肤都变成了玫瑰色的。 她站着不动，肩膀靠住护壁板。