on the air的意思

汉语翻译

例句：

1. A feather floats about on the air, especially on a windy day. If there is a shower of rain, the feather will get wet and heavy with water, and then it will sink straight to the ground.羽毛会在空中四处飘动，尤其是在多风的天气。如果遇上阵雨，就会因为淋上雨水变湿就沉，然后就会垂直落回到地上。
2. The bombers swooped on the air base.轰炸机突袭空军基地。
3. This channel comes on the air every morning at 7 am.这个频道每天早晨7点钟开始播放。
4. The news will be on the air tonight.这个新闻今晚将要广播。