是不是for example后加一个句子 such as 后加几个短语或单词?我们英语书上写：

是不是for example后加一个句子 such as 后加几个短语或单词?我们英语书上写：
They can stop studying some subjects if they do not like them ,for example ,History and French .
下面又有一句：They can choose other subjects like Art and Computer Science ,or languages such as Spanish and German .
同样是加两种语言为什么一个for example 一个such as for example后加一个句子 such as 后加几个短语或单词 的
as 和 like作 像 ..意思时 as后加句子 like 后加单词（可以两个）吗?上面写的：They can choose other subjects like Art and Computer Science