emission各种形式：emissional emit
例句
1、
The emission of gases such as carbon dioxide should be stabilised at their present level
二氧化碳等气体的排放应该稳定在当前水平。
2、
The availability of new passenger cars each year depends on whether car makers successfully complete an emission certification process.
每年新车是否可用，取决于汽车制造者是否成功地完成排放物鉴定程序。
3、
This emission of heat is completely independent of temperature and pressure.
这热的散发全然不受温度和压力的影响。
