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關注：1
2013-05-23 12:21
求翻譯：這是 21 世紀化學的第二個重大難題。是什么意思？ 待解決
 懸賞分：1
- 離問題結束還有
這是 21 世紀化學的第二個重大難題。
問題補充： |
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2013-05-23 12:21:38
This is the second major challenge of the 21st century chemistry.
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2013-05-23 12:23:18
This is the 21st century chemistry in the first 2 of the major challenges.
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2013-05-23 12:24:58
This is the 21st century chemistry second significant difficult problem.
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2013-05-23 12:26:38
This is the second major challenge of the 21st century chemistry.
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2013-05-23 12:28:18
正在翻譯，請等待...
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