heater emission的用法和样例：
例句
- Once installed, this heater operates automatically.
一旦安装好以后，这加热器就会自动地运行。 - This heater needs a new element.
这个加热器需要一组新电阻丝。 - The heater in my car doesn't work properly.
我汽车里的暖气设备出了点毛病。 - The emission of visible light by a hot object.
白热光物体遇热发出可见光 - The amount or rate of emission or ejection.
排放量流量、流速，或排出量，排出的速度
