Things happen quickly in the world of the Internet, so you've got to be able to make these necessary changes without having to hire a web designer again.

网络世界的变化发生的太快了，所以你需要在没有再一次雇佣网站设计人员的情况下有能力做一些必要的修改。

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The sugar people complain that, although the price of ethanol rises and falls with world sugar demand, petrol prices in Brazil do not adjust quickly to changes in the oil price.

制糖业人士抱怨称，尽管乙醇价格随全球蔗糖需求情况会上涨或下跌，但是巴西汽油价格不会随石油价格变动立刻调整。

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The world is changing quickly. Do you like the changes? Can you adapt to the changing world? How can we keep up with the changing world?

世界每天都在发生改变，我们的生活也无时无刻不在改变，你能够适应这快速变化的世界吗？你如何赶得上这变化的节奏？

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The sugar people complain that, although the price of ethanol rises and falls with world sugar demand, petrol prices in Brazil do not adjust quickly to changes in the oil price.

ECONOMIST: Energy in Brazil

But instead of quickly deploying Timeline world-wide as it has done with past changes to the site, Facebook first started with its users in New Zealand to test its reception there.

WSJ: Facebook's New R&D Machine