但我们现在还不知道地球上到底有多少水。

But it is not known how much water there is on Earth.

youdao

但我们现在还不知道地球上到底有多少水。

Yet our water is all the water Earth has ever had.

youdao

水非常深，她见不到底。

The water was very deep and she could not see the bottom.

youdao

而且，这可以帮助他们研究火星上到底有没有液态的水。

It can also help them decide whether the planet had liquid water.

youdao

小河里的水到底是深呢，还是浅呢？

Is the water deep or shallow?

youdao

这里的水不深，我触得到底。

The water is very deep here , I can't touch.

youdao

到底浇多少水取决于土壤类型。

Just how much water will depend on the soil type.

youdao

这里的水不深，我触得到底。

The water isn't deep here, I can just touch bottom.

youdao

这里的水不深，我触得到底。

The water isn't deep here, I can just touch bottom.

youdao