大气: 1.(地球周围的气体) atmosphere; air2.(呼吸; 沉重的呼吸) breath; heavy breathing 短语和例子跑得直喘大气 breathe heavily from running; 吓得连大气也不敢出 catch or hold one's breath in fear
The results show that laser beam far field intensity deflect to the wave length increasing direction about 0 . 2m ~ 0 . 3m when beam pass through flow field and propagate 1km in static atmosphere . high - power laser beam will have thermal booming effect when it pass through gas flow field 研究表明由于流场中存在强的激波结构，使得激光束远场强度分布向光程增大的方向发生了强的偏折，在光束通过流场在标准大气中传播1km后，偏折达到0 . 2m 0 . 3m 。
