During autumn, the leaves change color and fall down from the trees.

在秋天，树叶变了颜色，从树上掉下来。

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He ran slightly askew. Sometimes he'd trip over his own feet and fall down hard.

他的步子有些踉跄，有时会被自己的脚绊住，重重摔倒在地。

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We might try a new sport and fall down but we get back up and eventually experience exhilaration, even for a minute.

我们可以尝试一种新的运动，虽然会摔倒，不过我们会重新站起来，最终会收获愉快，哪怕是一分钟的短暂快乐。

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American Nick Symmonds won his 800-m semifinal heat, despite having three runners in front of him trip and fall down.

VOA: standard.2009.08.22

Everybody's going to put the cup down and assumes it's going to stay there but not fall to the floor.

每个人放下杯子时,都会假设杯子会稳稳地搁在那里,而不是掉在地上。

普林斯顿公开课 - 人性课程节选

And you know, that's tough for them but you know what, if you fall down,

对他们来说很难，但是如果你摔倒了，

不要放弃 - SpeakingMax英语口语达人

It's so easy for someone to slip on the ice and fall down and get run over.

FORBES: Vehicles

Solanka falls in love with Neela, a woman so improbably beautiful that she causes passers-by to crash their vehicles and fall down flights of steps.

ECONOMIST: New fiction

She carelessly drops them onto a chair she is standing near, so that the rings, necklaces and bracelets fall down and roll under the seating.

FORBES: What We Humans Value: The Nothingness of Life