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bhz_2001铁杆木虫 (著名写手)
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原句：The collected fraction was kept at 20oC for 8 hours and some light yellow solid appeared which was collected by filtration to give the pure product as a brown solid. 改后： The collected fraction was kept at 20oC for 8 hours and appeared some light yellow solid which was collected by filtration to give the pure product as a brown solid. 可否？ |
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mac194
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2楼2014-07-18 21:55:58
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The collected fraction was kept at 20oC for 8 hours and some light yellow solid appeared which was collected by filtration to give the pure product as a brown solid. 改为: The collected fraction was kept at 20oC for 8 hours and some light yellow solid appeared which was collected by filtration, producing a brown pure solid product. 不能像楼主那么改。 |
3楼2014-07-20 00:06:49
bhz_2001
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4楼2014-07-21 16:50:43