基本解释n.气态同根派生 gaseousness相关词英汉例句gaseou extinguishant 气体灭火剂Keywords heptafluoropropane;gaseou extinguishant;gaseous fire-extinguishing system;fire extinguishment; 七氟丙烷;气体灭火剂;气体灭火系统;灭火试验;gaseousness更多例句