For most music, Schindall explained, a high-end audio system with big speakers might do just fine with a 1-watt amplifier.
Schindall解释说，对大多数音乐来说，带有大功率扬声器的高端音频系统用1瓦的扩音器就可以了。
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By using lenses and mirrors to concentrate sunlight onto high-efficiency solar cells, start-ups such as SolFocus, in Palo Alto, are trying to reduce the cost per watt of solar systems.
The N200's light is only 13.5 lumens on the high setting (a 60-watt incandescent bulb is 850 lumens). That's very dim, but it's comparable to a kerosene lamp.