translation.en: Really, really successful businesses -- Google is great, great technological success, but it's also based on a very good psychological insight: People believe something that only does one thing is better at that thing than something that does that thing and something else.
translation.zh: 非常，非常成功的公司 -- 比如在技術上非常，非常成功的谷歌， 都会基于非常好的心理想法： 大家都相信当一个人专注的做一个事情的时候，他会，在这一件事情上， 比其他做此事以及其他的事情的人要做的好、