Any time you plan a trade program, you must consider what size position you are looking to establish.

当你计划交易的时候，你必须考虑你想建立的仓位大小。

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That is what the experience from the cap-and-trade program for acid rain suggests: costs came in well below initial predictions.

从酸雨灾害下实施的配额交易得出的经验是，实际代价总不愈起初的预计。

youdao

Start a toy trade program in your community. Instead of spending money on new toys made of materials such as metal and plastic, try getting kids in your family and community to trade toys.

将旧的玩具捐给更小的孩子,朋友,贫困儿童和幼儿园.在自己的社区建立一个玩具交换的程序.不要花钱去买由铁和塑料等制成的新玩具,试着让你自己家的孩子和社区的孩子们进行玩具交换,交换玩具就不会发生旧玩具被填埋的事了.此外,让你的孩子通过捐献旧玩具而不是扔掉它们来为环保做一些贡献.

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Thirty years ago, the Federal Trade Commission found that Stanley Kaplan's program could raise SAT scoresbut only by about twenty-five points.

VOA: special.2009.09.17

The Fulbright Teacher and Administrator Exchange Program offers a true exchange -- meaning two people trade jobs for a time.

VOA: special.2009.02.12

But a government program that paid Americans to trade in old vehicles for new, fuel-saving models increased car sales in the summer.

VOA: special.2010.01.01

Another approach to putting a price on carbon dioxide emissions is a cap and trade program.

WSJ: The Experts: Should There Be a Price on Carbon Emissions?

But he was unable to enact a cap-and-trade program to reduce the level of heat-trapping emissions.

FORBES: Obama's Sly Attack on Climate Change

In 2006 emissions in EU countries participating in the cap-and-trade program went up while U.S. emissions went down.

FORBES: Brrr!