fire drill的复数形式怎么写

Fire drill is also very necessary.消防演练也十分必要.After the meeting , the participants watched the city's fire special detachment of the squadron fire drill.会后, 与会人员观看了市消防支队特勤中队的灭火演练.Formulate pre - proposal on fire fight...

fire drill的音标：fire drill的英式发音音标为：['faiə dril]fire drill的美式发音音标为：[faɪr drɪl]...

n.消防训练，火灾避难训练...