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。

youdao

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。

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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.

但是很遗憾的是，这就是我们称之为的进步，如果你细看我们国家科技的每个领域就会发现我们每前进一步就要失去一些体力劳动的岗位。

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Professor Pervez Hoodbhoy of Islamabad's Quaid-e-Azam University says the Talibans rapid advance towards the capital was a wake-up call for the government.

VOA: standard.2009.05.05

Far from being inaccessible, though, travellers just need to know where to look -- and have the foresight to call in advance for a reservation.

BBC: Hong Kong��s secret nightlife spots

The duck here is so popular that you need to call in advance to order one (or arrive after 2:30pm and be prepared to wait).

BBC: Sampling Beijing��s imperial duck

Call in advance to secure a place on a walk, which begins daily at 10 am (except Sundays) at the Rail Reservation Centre on Chelmsford Road.

BBC: Child��s play amid Delhi��s chaos