发射物 meaning in English

emission
emitting substance
launcher
missile

Standard guide for laboratories engaged in sampling and analysis of atmospheres and emissions
从事大气和发射物取样和分析的实验室评定的规程
The nearby hollywood hills are being scoured for terrorists armed with stinger missiles or other devices capable of reaching the academy awards site
好莱钨周围的小山已经进行了巡逻，防止恐怖主义者使用刺激发射物或是其他的装置对奥斯卡颁奖现场进行袭击。