重点讲解：
1. for example
例如；比如；
eg. For example, this year we did something different.
比方说，我们今年采取了一些与众不同的方式。
eg. For example, third parties often affect discussions.
比如，第三方常常会对谈判产生影响。
2. think about
思考；想到；
eg. When a man began to prosper he was likely to think about things that he used to frown upon.
当一个人开始富裕起来的时候，他很可能会想做以前他觉得不屑一顾的事情。
eg. You only think about yourself.
你只想到你自己。
3. out of nowhere
突然（发生）；一下子（冒出来）；
eg. Houses had sprung up out of nowhere on the hills.
山丘上突然冒出一幢幢的房子。
eg. He was driving too fast on the express highway when a police car appeared out of nowhere and stopped him.
他正在高速公路上超速行驶，这时不知打哪儿冒出一辆警车把他拦住了。
