Make choices that mark off different distances so your pickups vary in length from 15 to 90 seconds, and modify your pace to match the distance.

选择了目标，就可以为自己划分出不同的距离，从要跑15秒到要跑90秒的距离，并且根据距离来调整自己的步伐。

youdao

Certification requirements vary by state, but in 2007 elementary teachers earned $50, 040 on average, with the added bonus of time off during the year.

各个州还有不同的资格条件。 在2007年，小学教师平均挣到50 040美元，额外还有每年假期的好处。

youdao

They also vary in color, ranging from clear to white or off-white.

颜色也不同，从清，白至黄白。

youdao

Instead a series of small turbines around the coast, which would fire off at different times as tides vary around the UK, would offer more continuous supply, he said.

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Javier Solana, the European Union's foreign-policy supremo, has warned that a Hamas victory could mean funds to the PA being cut off, although opinions of European member states vary widely as to how best to deal with such a situation.

ECONOMIST: Palestinians at the polls | The

Festivities vary according to the store, with special commemorative releases, one-off discounts and free pizza being popular choices.

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