New Haven, Connecticut (CNN) — Astronomers just discovered the largest reservoir of water ever, roughly 140 trillion times the volume of the Earth's oceans.
康涅狄格纽黑文(CNN)消息天文学家刚刚发现了迄今最大的水库，大约是地球海洋容量的140万亿倍。
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Accumulator Tank: a sealed air chamber combined with a water reservoir provides expansion volume to reduce pump cycling from minor pressure changes and give a steady flow.
压力鼓：你个密封的空间结合水箱来提供充足的空间来减少泵循环时较小的压力改变和稳定的水流。
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To solve the problems, this paper develops an optimum model based on random simulation method for solving volume of reservoir group flood control.