They all burst out laughing, sounding like a gaggle of geese.她们全都放声大笑, 像一群鸭子一样嘎嘎地叫着.A gaggle of journalists sit in a hotel foyer waiting impatiently.一群乱哄哄的记者坐在酒店大堂里焦急地等待着。In another hospital, I found a gaggle of rural pa...
雷达 、 光和其它形式的电磁波将其动量和能量通过空间输送出去.Radar, light, and other electromagnetic waves transfer momentum and energy through space.电磁波是由一种称为速调管的微波电子管产生的.The electronmagnetic wave is produced by microwave tubes called klystrons.每一物体...