for example和such as有什么区别?

先看下面两个句子:
For example,BBC broadcasts English programmes for China with explanations in Chinese.例如,BBC对中国广播的英语节目配有汉语解释.
English is spoken in many countries,such as Australia and Canada.许多国家都讲英语,例如澳大利亚和加拿大.
这两个短语都可以作"例如"解.
(1) 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.例如:
Ball games,for example,have spread around the world.例如,球类运动已经在世界各地传播开了.
What would you do if you met a wild animal - a lion,for example?如果遇上野兽,例如狮子,你该怎么办?
(2) 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.例如:
Some of the rubbish,such as food,paper and iron,rots away over a long period of time.有些废物,如剩饭、废纸和废铁,时间一久就烂掉了.