多年以来，中国气象学家一直在试验人工影响天，向云层发射化学炮弹进行人工降雨，或是明显阻止降雨。
For years, Chinese meteorologists have been experimenting with weather modification, shooting chemical cannons into the clouds to induce - or apparently stop - rain.
由于该炮在电热化学炮的基础上加入轻质气体这一理想工质，因而能大大改善弹丸后部的压力分布，提高火炮弹丸的初速。
Because joined light molecular weight gas in Elctrothermal Chemical Gun, the pressure distribution in projectile base is improved and the projectile velocity enhanced.
由于该炮在电热化学炮的基础上加入轻质气体这一理想工质，因而能大大改善弹丸后部的压力分布，提高火炮弹丸的初速。
Because joined light molecular weight gas in Elctrothermal Chemical Gun, the pressure distribution in projectile base is improved and the projectile velocity enhanced.
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