The interior of the Earth is hot.

地球内部很热。

It was from the study of these that so much was learnt about the interior of the earth.

正是从这两种波中的研究中，我们可以了解到地球内部的许多情况。

Was it from the interior of the earth?

是来自地球内部的吗？

We don't have a way of getting to the interior of the Earth.

我们没有办法进入地球内部。

But the technique he used was similar to how scientists study the deep interior of the Earth.

但他使用的技术类似于科学家研究地球深层内部的方式。

So what about the interior of the Earth? Beneath the Earth's crust is the mantle, which is responsible for plate tectonics, and therefore earthquakes. Is it a solid or a liquid?

那么地球内部是什么呢？在地壳下面是地幔，它是固态还是液态的？

For several days steeper inclines, some even frightfully near to the perpendicular, brought us deeper and deeper into the mass of the interior of the earth.

连续几天，陡峭的斜坡， 有些甚至可怕地接近垂直线，使我们越来越深入地球内部。

Except the interior of the earth doesn't have the same density everywhere, which means gravity is slightly stronger or weaker at different points around the globe, and the oceans tend 'puddle' more nearer to the dense spots.

只不过地球内部各处的密度不同，这意味着地球上不同地点的重力有小幅波动，并且海洋在密集处聚集的更多。