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關注：1
2013-05-23 12:21
求翻譯：on sunny days,if exposed to the sun for two hours,a solar cell can store enough energy to power a light for the whole evening是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
on sunny days,if exposed to the sun for two hours,a solar cell can store enough energy to power a light for the whole evening
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