Our sales have begun to fall off.

我们的销售额已经开始下降。

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。

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。

Slow down, or you'll fall off!

慢点，不然会摔下地的！

You can't fall off the horse.

你不能从马上摔下来。

The cat is going to fall off.

这只猫将要摔下来。

She didn't fall off her bike.

她没有从车上摔下来。

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。

In autumn, quite a few leaves turn yellow and fall off the trees.

在秋天，很多树叶变黄并从树上落下。

They fall off the plastic objects and are moved by the wind, just like dust.

它们就像灰尘一样从塑料物体上脱落，被风吹走。

After being exposed to air during digging, the coating under the paint began to fall off.

挖掘过程中经暴露在空气中后，油漆下的涂层开始脱落。

Afraid that in her unclear state of mind she might fall off the rock to her death, Grant climbed on all fours up a tight, narrow path by digging into the earth with his fingers and feet until he reached Paula.

担心她在神志不清的状态下会从岩石上掉下来摔死，格兰特手脚插入泥土，四肢并用地沿着一条狭窄的小路往上爬，一直爬到宝拉身边。

"I was turning the page to get ready for the next page, but the draft wind from the turn caused the spare pages to fall off the stand," Mr. Titterton said, "Luckily I was able to catch them and put them back."

蒂特顿先生说：“有一次，我在翻着一页，准备到下一页，但翻页带来的风导致剩下的乐谱从架子上掉了下来，但所幸的是，我接住了它们，并将它们放了回去。”

I saw her fall off her bike.

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。

I never fall off my bike.

我从来不会从车上摔下来。

I hope he won't fall off.

我希望他不会掉下来。

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。

They'll fall off!

他们会掉下来！

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。

Beware of objects that can fall off shelves.

小心可能从架子上掉下来的物品。

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。

In autumn the leaves wither and fall off the trees.

秋天，树叶枯萎并从树上落下来。

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。

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。

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。

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？

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。