成功与否，很重要的一种衡量方式就是内部量子效率，即LED的造光质量。
The important measure of success is the internal quantum efficiency, which shows just how good an LED is at making light.
而去年汉弗莱斯博士所领导的研究队伍将基于硅材料制作的内部量子效率从15%提升到了45%。
In the past year, Dr Humphreys's team has improved its silicon-based ones from 15% to 45%.
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