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，该数描述了龙卷风的强度。

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的龙卷风。

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

强的藤田数按照龙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，呈几何数长着。

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

现在, EF, 强的藤田数，0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，营养是一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.

他提议将所得税数七个减少到三个。

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一除以一加上 X 的值吗？

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加。

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

将 N 等于一半代入二项式定理，他得到了一个无穷数。

And, in this case, it's an infinite polynomial so  I should really be calling it a power series.

而且，在这种情况下，它是一个无限多项式，所以我真的应该将其称为幂数。

Its wind speeds were greater than 200 miles per hour making it an EF-5 tornado, the strongest classification on the Enhanced Fujita Scale.

龙卷风风速每小时超过200英里，为EF-5型龙卷风，是改良藤田数的最高强度。

When you have an infinite series you want the terms to decrease in size, as fast as possible.

当你有一个无穷数时，你希望其项的大小尽快减小。

To be more precise about it, the Taylor series expansion of tan(theta) shows that this approximation will only have a cubic error term.

更准确地说，tan(theta) 的泰勒数展表明该近似值仅具有三次误差项。

More generally, this is the core idea  that underlies Fourier transforms, and Fourier series, and the infinite  swell of topics that follow from those.

更一般地说， 这是傅里叶变换和傅里叶数的核心思想，以及随之而来的无穷无尽的主题。

So now the EF scale Enhanced Fujita Scale starts at zero and goes only to five and everything above 200 miles per hour is considered a EF5 tornado.

所以现在EF别的改良藤田数0始，只有5，每小时200英里以上的都被认为是 EF5龙卷风。

So now the EF scale, Enhanced Fujita scale, starts at zero, goes only to five, and anything above 200 miles per hour is considered an EF 5 tornado.

现在的EF等，即强藤田数，0始，只到5，任何超过200英里每小时的风暴都会被认定为EF 5龙卷风。