It is assumed that the emission and absorption of light energy by an atom or molecule is not a continuous precess but occurs in steps.
假定原子或分子发射光能和吸收光只能不是一个连续的过程，而是阶梯式发生的。
Because of the continuous decay, the quantity of radioactive material and the rate of emission of radiation decrease steadily.
由于连续衰变的结果，放射性物质的数量，辐射发射率都逐渐下降。
The composition of continuous emission monitoring system (CEMS) for fuel gas from stationary pollution sources is introduced, and the measurement methods are compared.
介绍了固定污染源烟气排放连续监测系统(CEMS)的组成，对测量方法进行了比较。
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