degasity

例句：

1. 1. The degasity of the air is measured by the barometer.
   空气的密度通过气压计来测量。
2. 2.The gaseous density of the atmosphere varies with altitude.
   大气的气体密度随海拔高度变化。
3. 3.The density of the gas is affected by temperature and pressure.
   气体的密度受温度和压力的影响。