As an efficient machine for treating fine particle ores, flotation column has found wide applications in flotation process.

浮选柱是细粒矿物浮选的有效设备，有着广阔的市场应用前景。

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But Lampetra's unique propulsion system could also have useful applications, as it has proved an efficient way to move a machine through water.

但是七鳃鳗机器人的独特推进系统也可能有其它应用，比如它已被证明为推动机器在水中运动的有效方法。

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One fax machine in the world can do nothing, but if everyone has one, they build an increasingly efficient network of communications.

如果世界上只有一台传真机没什么用，但是如果每人一台，它们就会成为一个有效的传播网络。

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But Lampetra's unique propulsion system could also have useful applications, as it has proved an efficient way to move a machine through water.

ECONOMIST: Robots