1.for instance 例如
例句:There are jobs more dangerous than truck driving; for instance, training lions.
2.end up 结束；终结
例句:She could have ended up a millionairess.
3.network effect 互联网效应
例句:This is not growth by network effect alone.
4.switch to 转换；切换
例句:Milk rounds are threatened as customers switch to buying from supermarkets.