The virus spreads through the air when an infected person expels air suddenly 当感染者急促地排出气体时病毒通过空气传播。
2.
Squeeze the teat on the end of the condom to expel air and make room for the semen 将安全套顶端贮液囊的空气挤出，以便存留射出的精液。
3.
Chemical breath analyser - estimation of the alcohol impregnation by analysis of expelled air - specifications and test methods 化学呼吸分析仪.对排出的空气进行分析以估计乙醇浸透度.规范和试验方法
4.
Class 1 electronic breath analyser - estimation of the alcohol impregnation by analysis of expelled air - specifications and test methods 1级电子呼吸分析仪.对排出的空气进行分析以估计乙醇浸透度.规范和试验方法
5.
Class 2 electronic breath analyser - estimation of the alcohol impregnation by analysis of expelled air - specifications and test methods 2级电子呼吸分析仪.对排出的空气进行分析以估计乙醇浸透度.规范和试验方法
