English is not the mother tongue of the Chinese people, "a good application must text smooth, rational structure, grammar is correct, easily understood and to understand peer," said Shao Yiming.
英语不是中国人的母语，“一份好的申请书必须文字流畅、结构合理、语法正确，容易被同行专家理解和看懂”，邵一鸣说。
This paper holds that comparatively rational grade and sequence can be obtained by taking into consideration of difficulty levels and usage frequency count of grammar items.
从语言难易度、使用频率等角度进行分级、排序，能够达到相对合理的程度；
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