Our energy requirements are going up in a geometric progression even faster than our population.

我们对能量的需求以几何级数增长，比我们的人口还要快。

The common ratio of this geometric progression is 2.

这个等比数列的公比是2。

We learned about geometric progression in math class.

我们在数学课上学习了等比数列。

Can you give me an example of a geometric progression?

你能给我一个等比数列的例子吗？

He explained how to find the nth term of a geometric progression.

他解释了如何求等比数列的第n项。

Each term in a geometric progression is the previous term multiplied by a fixed number.

等比数列的每一项都是前一项乘以一个固定的数。