in the air不肯定，不具体；在谣传中
air原始涵义：
n.天空, 大气, 空气; 气氛We breathe air.我们呼吸空气。
There was an air of excitement at the meeting.会议上气氛激昂。
空中Many birds are flying in the air.许多鸟儿在空中飞翔。
样子, 神态, 姿态They were displeased with her haughty airs.他们讨厌她高傲的派头。
vt. & vi.晾晒, 烘干The straw mattresses are airing there.草垫子正在那里晾着。
播送, 广播The program airs daily.本节目每天广播。
vt.使房间通风, 透气We air the room by opening the windows.我们打开窗子让屋子通风。
造句：
The scandal about him has been in the air for a long time.
有关他的那个丑闻已流传很久了。
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