So it is time to change the teaching method.

因此，现在是改变教学方法。

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An icon appears when it is time to change the battery.

时出现一个图标是时候更换电池。

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Knowing your goals will help you decide if it is time to change your images.

知道你的目标会帮助决定是否需要改变你的形象。

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And then I run a loop in which I read something in, I check to see if it's the right type, if it is, I change that variable to say it's now the correct type, which means the next time through the loop, I'm going to say I'm all set and I'm going to bounce out.

因为我还没输入，然后我运行一个循环,循环内部我输入一些东西,然后看看是不是正确的类型,如果是的话我改变input，Ok为真，来证明输入数是正确的类型，这就意味着下一次运行这个循环的时候,就可以跳出循环继续执行了。

麻省理工公开课 - 计算机科学及编程导论课程节选

Flat growth and high unemployment means it is time to change course, he says.

BBC: Ed Miliband: Cuts plan has locked UK into vicious cycle

Perhaps, therefore, it is time to change the convention and give such a name to an extrasolar planet.

ECONOMIST: Time to start giving extrasolar planets proper names

Tim Morris, chief executive of the Institute of Cemetery and Crematorium Management, says it is time to change tack.

BBC: Where could I be buried if graveyards run out of space?