当成本涨幅超出内部优化极限时，涨价成为唯一选择。
"You kind of sit and think, 'Oh, isn't technology great', until you have to do the traditional old thing of actually phoning somebody."
，详情可参考爱思助手下载最新版本
How does nuclear power work and why is the UK investing in it?
他们的工作，全是非医疗类的辅助服务，却精准戳中了医院和患者的需求：