Abstract: the writing has been in a university English teaching difficulty, when is the student studies English the most headache question.

摘要：写作一直是大学英语教学中的一个难点，也是学生学习英语时最头痛的问题。

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Motion control system, with the characteristics of high practice, rapid update and great teaching difficulty, etc, is the core curriculum of electrical automation major in college.

《运动控制系统》是高等院校电类自动化专业的一门核心专业课程，具有实践性强、内容更新快、教学难度大等特点。

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Process synchronization is an emphasis and difficulty in the teaching of operating system course.

在操作系统课程的教学中，进程同步是其中一个重点，也是难点。

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For all the difficulty of doing a rigorous evaluation in order to improve teaching performance across the board, I suspect it is a whole lot easier to identify the worst teachers in the school.

FORBES: Getting Rid of Bad Teachers