At one level this is a truism: By definition, people must be selling when prices fall.

从一个角度来说，这是真理：根据定义，在价格下跌时，人们一定在卖出。

youdao

Visualise them: This should be a no-brainer, but you’d be amazed at how many people fall in this trap.

把他们具象化 ：这个根本不用大脑的，但是要是知道多少人在这一步就跌倒，你一定会无比惊讶。

youdao

If China's growth rate were to fall to that level, it would be regarded as a disaster at home and abroad.

如果中国的增长率也跌落到上述水平，那么无论对本国还是对世界而言都是一个灾难。

youdao

He will be a senior at American University in the fall.

VOA: special.2010.06.18

When the charge is applied, if the upper plate is negative, we would expect that the negative droplet would be repelled at a rate exceeding the gravitational fall.

当电荷起作用时，如果上边的板子是负电的，我们可以期待负电的液滴会,超过重力下降速度的速度被排斥。

麻省理工公开课 - 固态化学导论课程节选

This would allow a risky portfolio to be liquidated at a predictable pace and cost should prices fall in response to a drying-up of liquidity.

ECONOMIST: When the sea dries up

Or consider a broker who e-mails someone a question about the trading volume at which a certain stock would be likely to rise (or fall).

ECONOMIST: How linguistic software helps companies catch crooks

In a short sale, a trader sells borrowed stock, hoping it will fall in price and can be repurchased later at a profit.

WSJ: McCain Says Cox Should Be Fired As SEC Chief Amid 'Casino' Markets