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。
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。
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