我恐怕你应该再做一遍，请注意介词的使用。

I'm afraid you should try it again. Please pay attention to the use of preposition.

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因此，确切了解学生对介词的使用情况对英语教学具有重要的意义。

Therefore, a clear knowledge of how EFL learners use English prepositions is of significance to the English language teaching.

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本文从英文文题的结构、介词的使用及国内外文题的比较三方面讨论了科技论文英文文题的撰写方法。

We are to discuss how to write the English title in Science and technology papers in three ways: they are the construction, usage of the prep.

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