While it had excellent sound quality, the low efficiency of the power amplifier unit made commercialization difficult.

尽管它有非常出色的音质，但是由于功率利用率低的问题，商业化是比较困难的。

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And analyze the feasibility of home central air-condition's multifunction, low power cost and improvement of air quality.

详细分析了家用中央空调的多种功能、节能低耗和改善空气质量的可实施性。

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The third generation mobile communications systems have the advantage of large capacity, low consumed power, fine voice quality and confidentiality.

第三代移动通信系统具有容量大，功耗低，通话质量高和保密性好等优点。

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Last year it yielded 21 million tons of low-quality coal that was hauled by rail to power stations slaking the country's desperate hunger for energy.

FORBES: Squash The Caterpillar