A gadget called the Jetlev can lift a person 30 feet high by pumping water from a backpack through a hose connected to a small, unmanned boat.
一个叫“水箭背包”的小玩意可能通过从双肩背包里抽水将人举到30英尺高，双肩背包通过一条软管连着一艘无人操控的小船。
In hilly areas, water pumping irrigation lift is high, and the irrigation water fee is high because of the high pumping cost, so the burdens on farmers are very heavy.
丘陵地区提水灌溉需要的扬程高，水费占灌溉成本的比重大，农民的负担很重。
On the basis of the comparison with long-distance high-lift pumping project, the paper pointed out the methods and measures of Yellow River in regular water -...
本文通过与高扬程远距离提灌工程比较，提出了解决黄土高原沿黄地区中小型提灌工程常规节水的办法和措施。
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