Replacing an outdated HVAC system with a more energy-efficient one can lower your monthly energy bills.

用新的节能空调系统来替换过时的可以减少你每月的能源支出。

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Regular exercise will make your heart and blood circulatory system more efficient, it will lower your cholesterol level, and also keep your blood pressure at a healthy level.

经常性的锻炼会使你的心脏和血液循环系统更有效率，它会降低你的胆固醇水平，并保持在一个健康的水平你的血压。

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A lower number suggests your cardiovascular system is more efficient at only doing this.

一个低的心率表示你的心血管编制才具更强。

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We need to give students and parents incentives to prefer a lower-cost, more efficient system (the for-profits are making big inroads here).

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He also said the government will adjust policies to lower import costs and make the trading system more efficient for importers.

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Persuading them that the system would be more efficient if they accepted lower fees and less autonomy will be difficult.

ECONOMIST: Medicine for export | The