In this edition, half of the exercises are provided with hints and answers and, in a separate manual available to both students and their teachers, complete worked solutions.
用这版，练习的一半配有暗示并且回答和，在里一单独手工对学生和他们的教师可提供，完成工作的解决办法。
In preparing this edition, I have benefited from criticisms and Suggestions of a number of readers, including teachers who have used the book in their courses.
在准备这一版时，我从很多读者的批评和建议中得到教益，包括那些以本书作为教材的老师。
The teachers and students conflicted have become in school edition practice the universal existence one kind of objective phenomenon.
师生冲突成为了学校教育实践活动中普遍存在的一种客观现象。
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