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

改进版藤田级数是以藤田命名的，该级数描述了卷风的强度。

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

咒语在空气中扩散，呈几何级数增长着。

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

增强的藤田级数按照卷风造成伤害的规模分级。

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

只要超过每小时200英里的速度认为是藤田级数5级的卷风。

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

之，营养级是一个生物体在食物链中的层级数。

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

现在, EF级, 增强的藤田级数，从0级开始, 只到5级。

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

它们称为几何级数，对吧，它们称为几何级数。

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

他提议将所得税级数从七个减少到三个。

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级数作为系数。

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级数上升。

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

牛顿的无穷级数实际上给出的是一除以一加上 X 的值吗？

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

随着分析聆听技能的提高，享受音乐的机将呈几何级数增加。

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，他得到了一个无穷级数。

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

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级数。

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

当你有一个无穷级数时，你希望其项的大小尽快减小。

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

卷风风速每小时超过200英里，为EF-5型卷风，是改良藤田级数的最高强度。

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) 的泰勒级数展开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级数的核心思想，以及随之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级别的改良藤田级数从0开始，只有5级，每小时200英里以上的认为是 EF5级卷风。

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等级，即增强藤田级数，从0开始，只到5级，任何超过200英里每小时的风暴认定为EF 5级卷风。