emit

发电厂向大气中排放大量的二氧化碳。

Power plants ___emit large amounts of carbon dioxide into the atmosphere.

所有车辆和工厂排放烟雾，这些烟雾会导致严重疾病，如癌症。

All the vehicles and factories ___emit fumes, which cause grave diseases such as cancer.

科学家测量恒星发射的红外辐射以确定其温度。

Scientists measure the infrared radiation that stars ___emit to determine their temperature.