求翻译：教师要教会学生一定的写作技巧。如切题，抓住全部要点，不能遗漏有用信息，但也不能加一些不着边际无关紧要的内容；要抓住不同的文章体裁对时态选用的特点。是什么意思？

Teachers to teach students writing skills. Such as relevant and to seize all the points, you can not miss useful information, but we can not add some far-fetched irrelevant; should seize the characteristics of the different genre's article tense selection.

teachers want to teach students a writing skills. If all questions, and seize all the elements that could not be omitted from useful information, but they cannot be the one that is not some marginal irrelevant; you want to grasp the content of the article different genre of choice when the state.

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Teachers to teach writing skills of the students. If irrelevant, catch all, cannot be left out useful information, but cannot add some of beyond was forgotten in irrelevant content; to catch a different genre selection on temporal characteristics of the article.

The teacher wants the church student's certain writing technique.If is relevant to the subject, holds the complete main point, cannot omit the useful information, but cannot add some to be irrelevant the immaterial content; Must hold the different article literature style the characteristic which se