Their storage reservoirs stop the flow of rivers and often submerge towns, farms, and historic sites.
它们的蓄水池阻止了河流的流动，于是经常会淹没城镇、农场和历史遗迹。
2
Blood vessels in the head tighten to stop the loss of body heat and then relax to let blood flow rise; that sudden rush of blood is what causes the headache.
头部的血管收紧以阻止身体热量的流失，然后放松让血液流动起来，血液的突然涌入是引起头痛的原因。
3
She tried to stop the flow of blood from the wound.