High-pressure gas could be released by pressure on a trigger.一按扳机高压气体就会被释出。White metal released from the dross flows out of the furnace and is ingoted.从浮渣中释出的白色金属流出熔炉被铸成锭。As household refuse decomposes, it produces an explosive gas, methane.家庭垃圾腐烂后会释出一种爆炸性气体—甲烷。