Next time you visit Bob, remember to give him a call in advance.
下次你去拜访鲍勃时，记得事先给他打个电话。
2
It's important that he does sometimes call them concentric circles because you have to understand that as you advance through the three stages, you're not leaving anything behind.
重要的是他确实有时称这些为同心圆，因为大家必须理解，随着我们走过这三个阶段，我们不能遗落下什么。
3
But this is what we call progress, Unfortunately, If you look at every area of technology in this country, as you advance there are fewer and fewer manual-type jobs.