英语语法分析

This is the emissivity value of the reference object.

这是引用对象的辐射率值。

Key problems on energy saving of high emissivity coating at middle temperature are discussed.

本文论述高发射率涂料在中温下使用，节能的若干关键问题。

By experiment, we proved that it is one of efficient method for spectral emissivity measurement.

经实验验证这是一种有效的发射率测量方法。