airn.空气；天空；空中；感觉；神态；曲调；装腔作势v.晾干；使通风；广播air cavn.美军空运战斗部队；美军空运侦察部队(空运至战场的美军分遣队)

1. There was a clearance of only ten centimetres between the two walls.
   两堵墙之间只有十厘米的空隙。
2. When fibers swell, they fill the air spaces and thus reduce ventilation.
   一般纤维膨胀后，占据了空隙，因而减少了通气能力。