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ll921木虫 (正式写手)
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| Single crystal samples with well-defined crystallographic orientations can help to understand these materials with the goal of improving their selectivity. However, properties of Tto were investigated only on polycrystalline samples in previous studies. To our best knowledge, there is only one paper reports that the Tto single crystal has been grown by Bridgman method. However, the quality is poor for a high-dislocation density and an impurity is inevitable introduced from the Pt crucible. Furthermore, the grown tto single crystal was mainly used as a substance and there is no data care about the character of Tto has been reported in the paper. While floating zone method is more suitable for growing Tto single crystal for it is crucible-free, a steep temperature gradient along the vertical direction and atmosphere-controllable. |
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lvdq44
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1）第三句：there is only one paper reports that ....reports 不对。应该改为there is only one paper which has reported that ...简单说就是there is only one paper reported that ...(过去分词作定语) 2）however用的有点多，看着改一个。可用的较为恰当的相应的词有whereas 、nevertheless、but. 3)第五句：there is no data care about ...care about 应改为caring about 或showing\which(that)shows\which(that)cares about... 4)第五句： the character of Tto has been reported in the paper...在 the character of Tto 后加 that \which 5）最后一句话while用的有点怪。 供参考。 |
2楼2009-12-31 10:40:46
ll921
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3楼2009-12-31 15:36:03
