total area of emittance

例句：

1. 1.The scientist calculated the emission rate of the device.
   科学家计算了该设备的发射率。
2. 2.The physicist measured the emission rate of the light bulb.
   物理学家测量了灯泡的发射率。
3. 3.The engineer optimized the emission rate to reduce energy consumption.
   工程师优化了发射率以减少能源消耗。