These diseased vessels rupture, causing hemorrhage and separation of the placenta.

这些病变的血管破裂，导致出血和胎盘剥离。

That leaves your nose's sensitive membranes more exposed, so blood vessels rupture more easily.

这会使您鼻子的敏感膜更加暴露，因此血管更容易破裂。

A nosebleed starts when blood vessels rupture in your nose, so if you've heard that the blood is coming from your brain, that's almost definitely not what's happening.

当您鼻子中的血管破裂时就会流鼻血，所以如果您听说血液来自您的大脑， 那几乎肯定不是正在发生的事情。