Speculators, by contrast, buy and sell securities based on whether they believe those securities will next rise or fall in price.

投机者，相比之下，购买和出售证券取决于他们是否认为这些证券的价格将上升或下降。

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Alvin Hansen and Paul Samuelson constructed equations to predict how a rise or fall in spending in one part of the economy would propagate across the whole of it.

阿尔文·汉森和保罗·萨缪尔森构建了一些描述经济体某一部分支出的涨跌如何扩展至整个经济体的等式。

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Some love it. Some hate it. Most do both or fall in between.

有人爱，有人恨，但大多数人是又爱又恨，或者说是既不爱也不恨。

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To improve clay soils, mix in garden waste or other organic matter and turn the soil deeply in the fall.

VOA: special.2009.03.10

But I choose to walk, and just walking in the seasons whether it's snowing or raining, or gorgeous sunny fall day.

但是我选择走路，什么季节都是如此,无论是雪天，雨天，亦或是秋高气爽。

普林斯顿公开课 - 人性课程节选

Is it part of your nature to be good or bad or is it largely due to the situation that you fall in?

人性究竟是善还是恶,或者说是否应当更多地归因于所处的环境

耶鲁公开课 - 心理学导论课程节选

Come out this far, and you either contract cabin fever or fall in love.

BBC: Lonely Planet's top five day trips from Miami

Different durations of bonds vary in value to the degree that interest rates will rise or fall in the future.

FORBES: Interest Rates For Dummies: Solving The Interest-Rate Puzzle

Farecast was a travel site that predicted whether airfares on a given route would rise or fall in the future.

FORBES: United Airlines to Sell Options on Its Own Tickets