They just simply force air onto the hands and it just sheers away the water molecules The third option then is the paper towels.

他们只是简单地将空气吹到手上，它只是将水分子带走。第三种选择是纸巾。

This can happen because the placenta is less elastic than the uterus, the strong forces from traumatic events like these can cause the placenta to sheer away from the uterine wall.

由于胎盘没有子宫那么有弹性，所以这些创伤性事件的强大外力会导致胎盘脱离子宫壁。