Fujita is the namesake of the enhanced Fujita Scale which characterizes the intensity of tornadoes.

改进版藤田数是以藤田命名的，该数描卷风的强度。

Anything above 200 miles per hour is considered an EF-5 tornado.

只要超过每小时200英里的速度都会被认为是藤田数5的卷风。

The enhanced Fujita scale rates tornadoes based on how much damage they cause.

增强的藤田数按照卷风造成伤害的规模分。

The spell grew geometrically, as it rippled through the air.

咒语在空气中扩散，呈几何数增长着。

So, now, the EF scale, Enhanced Fujita Scale, starts at 0 and goes only to 5.

现在, EF, 增强的藤田数，从0开始, 只到5。

So to summarise, trophic levels are the number of steps in an organisms is within a food chain.

总而言之，营养是个生物体在食物链中的层数。

He's proposed reducing the number of income tax brackets from seven to three.

他提议将所得税数从七个减少到三个。

One approach involves adding up every chance the human has to win, using geometric series.

方法是通过使用几何数，将人类获胜的每可能性相加。

The robot's total probability is also the total of a geometric series.

机器人的总概率也是个几何数的总和。

How does this series compare to the human's?

这个数与人类的相比如何？

So that just alternating series with plus and minus signs as the coefficient.

因此这只是以正负号交替的数作为系数。

Does Newton's infinite series actually give you the value of one over one plus X?

牛顿的无穷数实际上给出的是除以加上 X 的值吗？

Perhaps geometrically increased, and that's very unlikely to slow down.

或许呈几何数增长，而且这非常不可能会放缓。

They came up with something called the F-scale, which we still use today.

他们提出个叫做藤田数的系统，我们至今仍在使用。

Beyond that the difficulty of solving them rises in almost geometrical progression.

除此之外，解决它们的难度几乎呈几何数上升。

They're called geometric series right, they're called geometric series.

它们被称为几何数，对吧，它们被称为几何数。

As one develops analytic listening skills, the opportunities to enjoy music increase geometrically.

随着分析聆听技能的提高，享受音乐的机会将呈几何数增加。

Two facts about geometric series are useful here.

关于几何数，有两个事实在这里很有用。

Putting N equals a half into the binomial theorem he gets an infinite series.

将 N 等于半代入二项式定理，他得到个无穷数。

We could bypass geometric series by starting with this reasoning.

我们可以通过以下推理来绕过几何数。