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。
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。
In 'come back', 'break down' and 'fall off', 'back', 'down' and 'off' are all adverbial particles.
在comeback、breakdown和fall off中，back、down和off都是副词小词。
A surge in domestic sales helped compensate for a fall-off in export sales.
国内销售的增长帮助补偿了出口销售的减少。
Our sales have begun to fall off.
我们的销售额已经开始下降。
My partner says no because the boiler could go, or the roof fall off, and we have no savings to save us.
我的另一半说不，因为锅炉可能会坏掉，屋顶可能会掉下来，而我们没有可用以自救的储蓄。
我希望他不会掉下来。
这只猫将要摔下来。
If you fall off your horse, you can just get back on.
你从马上摔下来你再骑上去就可以了。
Why things don't fall off the earth is explained in the text.
为什么东西不掉离地球课文里已有说明。
In autumn the leaves wither and fall off the trees.
秋天，树叶枯萎并从树上落下来。
你不能从马上摔下来。
Be careful! Don't fall off the tree.
小心！别从树上摔下来。
Look out! You would fall off the ladder.
当心！你会从梯子上掉下去的。
You'll break your neck if you fall off the roof.
你要是从屋顶上跌下来会摔死的。
When you are learning to ride a bicycle, you often fall off.
初学自行车时，常会从车上掉下来。
The fat man is going to fall off his horse.
这个胖男人要从他的马上摔下来了。
Who was lucky enough not to die after he fall off some stairs?
是谁那么走运，从几级楼梯上摔下来还没有死？
他们会掉下来！
她没有从车上摔下来。
Slow down, or you'll fall off!
慢点，不然会摔下地的！
我从来不会从车上摔下来。
我看到她从自行车上摔下来。
I saw the boy fall off the tree.
我看见那个男孩从树上掉下来。
Beware of objects that can fall off shelves.
小心可能从架子上掉下来的物品。
Eventually you develop a scab, and then it would fall off as it healed, and you'd be left with a scar.
最终你会结成一个痂，当它愈合的时候，它会脱落，然后你会留下一个伤疤。
These small square stones became a problem for the building and continued to fall off the face for 40 years until a major renovation was undertaken.
这些方形的小石板成了大楼的问题，四十年来不断从外墙脱落，直到一项重大的翻新工程开始进行。
His strange habit makes sense when you consider that he's an environmental scientist who studies how to reduce litter, including things that fall off garbage trucks as they drive down the road.
他是一位研究如何减少垃圾的环境科学家，其中包括研究减少垃圾车行驶时掉下来的东西，当你考虑到这一点，自然就能明白他为什么会养成这种奇怪的习惯了。
You will fall off that bike now and then.
你会时不时从自行车上摔下来。
I was sorry the moment I saw her fall off the tree.
看到她从树上掉下来的那一刻，我很抱歉。
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