1·During periods of low demand, jockey pumps are used to meet these lower water flow requirements.
在需求较低的时期，赛马泵用于满足这些较低的水流量要求。
2·For ordinary people, the frustrations are endless. Refrigerators become useless. Water runs out because it relies on electrical pumps. Children do their homework by candlelight.
对普通人来说，挫折更是永无止尽。冰箱变得毫无用处；水也没了，因为水得靠电动泵；孩子们在烛光下做作业。
3·These changes, imperceptible to the human eye, occur as the heart pumps blood through the body.
这些人类眼睛无法知觉的变化发生在心脏将血液泵向全身的时候。
4·This means that some radioactive material gets into the turbine and condensers and pumps, but these are usually very short-lived radionuclides.
这意味着一些放射性物质进入了涡轮和冷凝器还有泵，但是这些进去的大多都是短期的放射性核素。
5·"Blood pressure" is the force of blood pushing against the walls of the arteries as the heart pumps out blood. If this pressure rises and stays high over time, it can damage the body in many ways.
血压是推动血液从心脏泵出到动脉壁的力量，如果这种压力上升并在一段时间内保持时间过长，它可以破坏人体的许多方面。