并检测其食物功效比值 food efficacy rate
这种技术很有前途，不过尚需更多研究以确定其功效。
This is a promising technique that needs more research to determine its efficacy.
是什么缘故起因促使你从事这些项目？其功效怎样？
What prompted you to begin such projects? How did they end up?
精巧的设计保证光线可以从LED中轻松释出，从而改进其功效。
And design tweaks have improved efficiency by ensuring that light can escape from LEDs easily.
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