Airaut艾罗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 temperature空气温度Airflow Nesting气流集聚air post parcel航空邮包Air Force Cross空军十字勋章air-foam pump空气泡沫泵air fluid level气液平面air-tightightadj.不透气的；气密的；密封的 ; 严密的；无懈可击的airbrake switch空气制动开关air filter unit空气过滤设备air space cable充气纸绝缘电缆,空气绝缘电缆

1. Epithelium also lines the air tubes and lung cavities.
   上皮组织还衬盖气管和肺腔。
2. An appropriate-size tube is chosen to fit the trachea.
   选用与气管大小相仿的管子。