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1.The efficiency of the new device is much higher than that of the old one, with a spontaneous emission coefficient of 20% compared to 5% for the old model.
新型设备的效能比旧型高出许多，自发发射系数为20%，而旧型仅为5%。
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2. In the study of quantum mechanics, the spontaneous emission coefficient is crucial for understanding how particles interact.
在量子力学研究中，自发发射系数对于理解粒子间的相互作用至关重要。
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3. The researchers found that the spontaneous emission coefficient was influenced by the temperature and pressure ofthe gas.
研究人员发现，自发发射系数受气体的温度和压力影响。