因大气层的重量而产生的压力。在海平面上有一平均数值，即一个标准大气压，随着海拔高度增加而减小。
Pressure caused by the weight of the atmosphere. at sea level it has a mean value of one atmosphere but reduces with increasing altitude.
普遍接受的标准1020在海平面每平方米瓦。
The generally accepted standard is 1020 watts per square meter at sea level.
普遍接受的标准1020在海平面每平方米瓦。
The generally accepted standard is 1020 watts per square meter at sea level.
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