Rationally selecting cranes are essential to efficiently using them.

起重机的合理选择是有效使用的基础。

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“This result suggests to me that we can probably do better in efficiently using the addresses we have,” Heidemann said.

“这向我暗示，我们可能可以更好的、更有效地使用这些已有的IPv4地址”Heidemann说。

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In a few years, Dr Belcher speculates, it may be possible to build a prototype machine to split water efficiently using sunlight.

贝尔切博士推测在几年内，就有可能建造出一台能够高效利用阳光来分解水的原型工作机。

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The economy as a whole runs more efficiently by using less oil and producing less pollution.

WHITEHOUSE: President Obama: A New Consensus on Auto Emissions

For example, because we knew exactly how much she was being fed and what she was being fed, we were able to get information about how efficiently she was using that food, how efficiently she was turning it from salmon filets, for example, into new white shark.

NPR: Released Great White Shark Located

But the one we normally talk about is the productivity of labour: how efficiently are we using the labour available to us?

FORBES: Of Course China's Inefficient: That's Why It's Poor