We had to pay the full price in advance for an escorted tour.

我们必须提前付全款，才有导游陪同。

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When you take children to other kinds of stores, explain how to plan purchases in advance and make unit-price comparisons.

当你带孩子去其他类型的商店时，解释如何事先计划所买的东西和如何做单价比较。

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Alternatively, if the seller has set a minimum sale price in advance (the 'reserve' price) and the final bid does not reach that price the item remains unsold.

或者，如果卖家已经提前设定了最低售价(“保留价”)，而最终的竞价没有达到这个价格，拍卖品则不出售。

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"In the fair-trade system the farmergets a higher advance price and at the end of the year they also get bonus payments."

VOA: standard.2010.03.10

The 12-month advance in the Consumer Price Index has been above 2% for the past five months, hitting 3.6% for the 12 months ending both May and June.

FORBES: The Dollar, Gold And The Quality Of Money

Moreover, during the three months ending January, the rate of advance in the producer price indices for intermediate products, and finished goods have all accelerated into double digit annual rates of advance.

FORBES: Higher Inflation Is On The Way

With wall and window units, ask in advance about the price of service calls, labor and any parts.

WSJ: Don't Wait to Service AC Units