for example用来举例说明某一论点或情况,一般只举同类人或物中的"一个"为例,作插入语,可位于句首、句中或句末
For example,BBC broadcasts English programmes for China with explanations in Chinese
such as用来列举事物时,一般列举同类人或事物中的几个例子.插在被列举的事物与前面的名词之间,as后面不可有逗号
English is spoken in many countries,such as Australia and Canada