Mountain air contains less oxygen than air at lower altitudes, so breathing it causes the heart to beat faster and the body to burn more energy.

高山上的空气含氧量小于比低海拔地区，所以呼吸时心脏会跳动地更快，身体也会消耗更多能量。

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In the thermal analysis, the initial temperature of billet, beat fluxes (heat flow per unit area) of positive and negative value and convections to surrounding air are considered.

热分析中考虑了坯料的初始温度、外加热源和冷却源的热流密度以及坯料和空气的对流传热。

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Extremely hot summer weekend, does the friend of single stay around to toward computer perhaps television to beat hair time in air condition building, still be fond of not to know the place?

夏日周末酷热的夏日周末，单身的朋友您是否停留在空调房里对着电脑或者电视打发时间，还是迷茫不知所处？

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As it stands, Klipsch's G-17 Air is the current AirPlay-enabled soundsystem to beat at its price point.

ENGADGET: Klipsch Gallery G-17 Air soundbar review

Its four carbon fiber and foil wings beat up to 20 times per-second, propelling it through the air as if it were swimming rather than flying.

ENGADGET: BionicOpter dragonfly drone flutters about, blows minds

Catherine, wearing a Games jacket, was seen clapping her hands above her head and punching the air as they beat rivals Germany in a close sprint to the line.

BBC: Paralympics drugs testing policy defended