Once the user decides which stock to buy, he or she places a buy order.

一旦用户决定要买哪种股票，他或她就会下购买订单。

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Since the order is changed, he or she has to place a buy order again.

因为订单被修改了，他或她就要再次下购买订单。

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The user is allowed to place more than one buy order, and each buy order will be treated as a separate logical unit of work.

用户可以下多个购买订单，并且每一个订单将会作为一个单独的逻辑单元来处理。

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You can buy roses from a garden center or by mail order.

VOA: special.2011.05.31

Savings and Loans are the same as Building Societies, but the idea--the original idea and also the general idea today -is that these are banks set up for small savers in order that they can buy a house.

储贷协会和建房互助协会是一回事,其初衷以及现在的一般理念是,这些银行的建立是为了,让小额储蓄者买得起房子

耶鲁公开课 - 金融市场课程节选

You could use the "what do you" pattern in order to ask which article he wants to buy.

你可以用“What do you”句型来问男友他想买哪一个。

What do you 课堂 - SpeakingMax英语口语达人

"Fundamentally it happens when the last buyer puts in his last buy order, " says David Schwartz, stockmarket historian and crash prophet.

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To trade this opinion, you can place a stop-buy order a few pips above the resistance level so that you can trade the potential upside breakout.

FORBES: How To Place Orders With A Forex Broker

Here is how Island works: When a broker or trader who uses Island places a buy order, it is routed first to Island to check for matches.

FORBES: Guerrillas on Wall Street