1、Combine the principle with efficiency safely.
安全與效率相結合原則。

2、People who become obsessed with efficiency can become rather joyless.
熱衷于效率的人變得很少高興。

3、DEVELOPMENT OF AMORPHOUS SILICON SOLAR CELLS WITH EFFICIENCY OVER THAN 10%
效率高于10%的無定形硅太陽電池的研制