It thickens the blood around a cut to stop bleeding.

VOA: special.2010.09.14

This surface layer thickens at an early stage in a mouse after 8 days of development.

发育8天后，老鼠早期胚胎的,外胚层开始增厚。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

Light thickens, and the CrowMakes Wing to th' Rookie Wood.

天亮了，乌鸦飞回他们的巢穴。

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And the plot thickens if you look ahead to Section 140.

而继续看到第140节时，情况就更复杂了。

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