At first, I fell down a few times, but now I seldom fall down.

一开始我摔了几次，但现在我很少摔倒了。

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But he never fell behind. He's headed to college this fall.

但他从来没有落后过，今年秋季他将考入大学。

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We believed that if the markets fell, then the mood of people on Twitter would fall.

我们相信如果市场不太景气，那么，微博客上的人的情绪也相应的会进入低潮期。

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The mining group reported a 22% fall in first-half profit as metals prices fell and spoke of near-term uncertainty, but said it was confident about demand in the long run.

WSJ: European Stocks Rise as Markets Close

Last fall Berkshire announced that if the per-share book value fell below 110% of the stock price (1.1x the stock price) the company would step in and repurchase shares.

FORBES: Connect

When Wall Street went into meltdown last fall, the bottom fell out of the exotic-instrument market, and many of Harvard's private-equity investments proved to be unsalable--that is, worthless, at least temporarily.

FORBES: Magazine Article