词是在一组形式之下的共同要素，是词汇的单位，是一个词条，或是一个词位。
Word is the common factor underlying a set of forms, a unit of vocabulary, a lexical item, or a lexeme.
第四部分分析不同类型的网络课程，形成网络课程结构共同要素说，并对其结构要素进行具体论述。
The fourth part analyzes different types of on-line course, forms the common essential factor saying of on-line course structure, and specifically elaborates elements of on-line course structure.
这一群体拥有全球性阶级的要素，其成员彼此有许多共同之处，就像他们自己国家的穷人彼此相似一般。
This group has the makings of a global class whose members have as much in common with each other as with the poor in their own countries.
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