甲烷在常温常压下是一种气体，使其比汽油、柴油更难作为汽车燃料使用。
Methane is a gas at ordinary temperatures and pressures, making it harder than gasoline and diesel to use as vehicle fuel.
将标本固定于云母上，在接触及轻敲模式下扫描成像，操作在常温常压下进行。
Mg sample preparation for AFM was fixed on mica and AFM images of scanning observation were captured by contacting and tapping modes and operated under normal atmospheric pressure and temperature.
试验结果表明：在常温常压下，用硫酸浸出该氧化锌矿石锌的浸出率可达到78%。
It was found that 78% zinc extraction was obtained at room temperature and atmosphere pressure.
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