This type of blood clotting usually appears black.

这种血液凝块一般都呈现为黑色。

Judging by the blood clotting, the victim died a long time ago.

根据这些血液凝块判断，受害者死亡很久了。

Doctors can tell your condition based on the speed of your blood clotting.

医生能根据血液的凝结速度辨别你的身体状况。

But is bigger necessarily better when it comes to clotting?

但是对于凝血来说，越大效果就一定更好吗？

And no one knows how little it takes to trigger that clotting.

而且没人知道多小的原因就能导致血液结块。

If your blood isn't clotting, you're less likely to have a heart attack.

如果你的血液不发生凝结，你就几乎不会得心脏病。

But in many such cases, doctors don't suspect a blood clotting problem.

但往往遇上这些情况时，医生不会想到是凝血有问题。

"Alcohol thins the blood and reduces the likelihood of clotting," White says.

“酒精稀释血液，并减少发生血栓的可能性，”White说。