a blast of什么意思

A blast of hot air came from the furnace.一股热风从火炉里吹出来.A blast of hot air blows in.一股热气吹进来.I heard a blast of the whistle in the distance.我听到远处一阵口哨声....

a blast of的音标：a blast of的英式发音音标为：[ə blɑ:st ɔv]a blast of的美式发音音标为：[e blæst ʌv]...