n.大氣干擾(引起天電干擾的電磁現(xiàn)象)；氣氛

What's the atmospheric pressure today? 今天的氣壓怎么樣？

An electromagnetic wave of audio frequency produced by atmospheric disturbances such as lightning, having a characteristically decreasing frequency responsible for a whistling sound of descending pitch in detection equipment. 嘯聲干擾一種由于諸如閃電等大氣干擾而產(chǎn)生的音頻電磁波，具有典型的逐漸減弱頻率的特征，該頻減引起了檢波設(shè)備中調(diào)逐漸下降的嘯聲