Engineers say that scale is the key to wind power.

工程师们说规模是风电的关键。

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Engineers have built dozens of the machines, called wave-energy converters, and tested some on a small scale.

工程师们已经造出了几十种被称作“波浪-能量转换器”的机器，其中一部分还通过了小批量测试。

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On a conference call, Mr. Wang disclosed that in 1998 he had instructed 20 of his top engineers to quietly scale up BYD's cellphone-battery technology so that it could be used to power cars some day.

王传福在一次电话会议上透露说，1998年他指示手下20名高级工程师悄悄地改进比亚迪的手机电池技术，以便有一天能用于汽车。

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Utility-scale engineers long ago figured out this presents unprecedented operational, safety and control hurdles.

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The point being that the cloud supplier can hire all the great engineers, gain economies of scale in hardware and bandwidth and so on.

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New techniques let engineers shape objects at a tiny scale.

ECONOMIST: Manufacturing