帮忙解释一下这句的结构原句：perhaps most challenging is the set of skills required to produce a written assignment,the most common means by which student learning is evaluated.请问逗号以后的部分与前句是什么结构关系啊
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帮忙解释一下这句的结构原句：perhaps most challenging is the set of skills required to produce a written assignment,the most common means by which student learning is evaluated.请问逗号以后的部分与前句是什么结构关系啊
帮忙解释一下这句的结构
原句：perhaps most challenging is the set of skills required to produce a written assignment,the most common means by which student learning is evaluated.
请问逗号以后的部分与前句是什么结构关系啊?并请翻译一下,谢谢!
帮忙解释一下这句的结构原句：perhaps most challenging is the set of skills required to produce a written assignment,the most common means by which student learning is evaluated.请问逗号以后的部分与前句是什么结构关系啊
perhaps most challenging (thing)做主语,IS 谓语,the set of skills 表语,required to produce a written assignment做skills的后置定语,the most common means做the set of skills required to produce a written assignment的补语,但又有点像同位语
可能最大的挑战就是一系列写文章所需的技能,一种评价学生学习的最寻常的方式
也许，最具挑战性的是书面作业所需的技巧，它是评价学生学习情况的最常用的方法。
the most common means 是the set of skills 的同位语。但翻译的时候可另起一句。
也许，最具挑战性的是完成书面作业所需的技巧，这是评价学生学习情况最常用的方法。
the most common means 是the set of skills 的同位语。
en就是一楼说的
句意：
或许最复杂的就是学生完成书面作业所要求的整套技能，这是评估学生的最常用的方法。
逗号后面是解释a written assignment的内容，可以认为是同位语。