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關注：1
2013-05-23 12:21
求翻譯：The led (light-emitting diode) has an average life-expectancy that is four times greater than that of an ordinary bulb.是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
The led (light-emitting diode) has an average life-expectancy that is four times greater than that of an ordinary bulb.
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