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pitlord999
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xiaoyezi8085(½ð±Ò+2):лл²ÎÓë
xiaoyezi8085(½ð±Ò+2):лл²ÎÓë
| UV light comprises approximately two to three percent of sunlight, whilst visible light comprises 45 percent. |
2Â¥2009-08-13 23:54:36
goodtimega
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xiaoyezi8085(½ð±Ò+2):лл²ÎÓë
linghanyuan(½ð±Ò+1,VIP+0):¾äʽ¼ò½à£¬µ«±È½Ï¶ÔÏóÃ²ËÆ¸´ÔÓÁË£¬Ð»Ð»½»Á÷ 8-14 09:12
| Sunlight consists of 2-3% ultra-violet, to be compared to 45% of visible light. |
3Â¥2009-08-14 07:44:26
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4Â¥2009-08-14 09:03:28














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