Given that there is a living to be made at night, and given that alternative daytime trades are thoroughly occupied, natural selection has favoured bats that make a go of the night-hunting trade.

考虑到夜晚也可以生存，并且可供选择的白天的“交易”完全被占用，它们自然选择偏爱那些成功在夜间进行捕食“交易”的蝙蝠。

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If one part of a system decides to make a trade based on the current price and the actual trade gets delayed for whatever reason even a small change can result in a significant loss of money.

如果系统中的某个部分决定以当前的价格进行一笔交易，但是由于某些原因这笔交易被延迟了，那么价格的一点微小变化也许都会给用户带来巨大的损失。

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Moreover, part of the cost of absorbing past oil-price hikes has been higher consumer debt and a huge trade deficit, both of which make America's economy more vulnerable.

另外，过去一部分石油价格上涨的作用是由消费者负债增加及贸易赤字来吸收，而这两种方式都使得美国经济更加脆弱。

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Some analysts have expressed concern that holding the trial in New York City, the site of the 2001 attack on the World Trade Center, will once again make the city a prime terrorist target.

VOA: standard.2009.11.25

If you make a lot of money on a trade, the IRS does not tax you on that trade alone.

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So if a drop in the dollar is to make much of a dent in the trade deficit, it will have to be really big.

ECONOMIST: Why America's deficit is hard to turn around

The Luddites wished to return to a more natural way of life, in which skilled craftsment could ply their trade and make a living, and in which civilization was not ravaged by all the ills of industrialization (including heavy metals and other factory-produced toxins poisoning millions).

FORBES: When Americans Rejected Small Pox Vaccines