Mountain air contains less oxygen than air at lower altitudes, so breathing it causes the heart tobeat 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。
2
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。
3
Extremely hot summer weekend, does the friend of single stay around to toward computer perhaps television tobeat hair time in air condition building, still be fond of not to know the place?