It's important to tighten up the wheels properly, otherwise they vibrate loose and fall off.

把车轮拧紧很重要，否则它们会振动而松脱。

《柯林斯英汉双解大词典》

Although the market has been flat, residential property costs remain high. Nevertheless, the fall-off in demand has had an impact on resale values.

尽管市场一直疲软，房价持续偏高。然而需求的减少还是对二手房价格产生了影响。

《柯林斯英汉双解大词典》

In 'come back', 'break down' and 'fall off', 'back', 'down' and 'off' are all adverbial particles.

在come back、break down和fall off中，back、down和off都是副词小词。

《牛津词典》

Eventually you develop a scab, as it healed, and then it would--and then the scab would fall off, and you'd be left with a scar.

愈合之后会变成一个疤,这个疤后来会脱落,你身上会留下疤痕

耶鲁公开课 - 生物医学工程探索课程节选

With origins in the 14th century, it is thought to refer to the "off-fall" from the butcher's block, meaning the less desirable parts.

WSJ: 'Innard' Circle Eats All Kinds of Offal Food

David Burnham, a co-director of TRAC, told The Huffington Post that the fall-off in financial fraud prosecutions most likely does not reflect a fall-off in financial fraud itself.

FORBES: Not Prosecuting the Banks

The increase in so-called utility-scale installations masked relatively flat growth in residential rooftop solar and a fall-off in commercial installations.

FORBES: Is The U.S. Solar Boom Slowing Down?