air rate的用法和樣例：
例句
- The numerical calculation result shows that the viscosity and air voids of drilling fluid have notable influences on the transmission of DPSK signal.
數值計算表明，鑽井液黏度和含氣率對信號傳輸的影響最大。 - However, due to the low temperature in winter, the rate of gas production in the marsh gas tank becomes lower, even the marsh gas tanks are frosted.
但我國北方冬季氣溫低，導致沼氣池產氣率低，甚至出現凍裂池體等現象。
