I heard that the last four letters were dubba-you, ex, why, zee.

我听到最后个字母是dubba-you，ex，why，zee。

Marsha, these are letters to my family and friends back at home......four letters!

玛莎，这些是给我家乡亲友信件......封信！

Four letters in three months and this is the first mention of Kathleen Johns?

三个月来封信 这是第一封提到凯萨琳琼斯？

They've got a repeating four- letter word ending with two symbols that stand for L.

现在他们找到好几个两个一样 个字母字。

The code comes out to be a fairly simple alphabet, four letters: A, T, C and G.

这个遗传密码由简字母表组成，个字母，A，T，C和G （碱基）。

Can you fit that into your four letter code?

能把它放入字母代码中吗？

Sometimes three or four letters together can make one sound.

有时三个或个字母在一起可以发出一个声音。

And it's just a cool four letter word.

这只是一个很酷个字母词。

" Fast" has four letters and four sounds.

“快”有个字母和个声音。

Ziggy had scrawled four letters across the page.

齐吉在页面上涂鸦了个字母。

Imagine what it would be like if the English alphabet had four letters.

想象一下， 如果英文字母表有个字母会是什么样子。

Hey, what's a four- letter word for cut?

嘿, 什么是字母切割词?

So all life on this planet is made in ATCGs, the four letters of DNA.

所以这个星球上所有生命都是由 ATCG 构成，即 DNA 个字母。

Don’t get me too excited because I use four letter words when I get excited.

不要让我太兴奋， 因为当我兴奋时我会使用个字母词。

Part four: letters and sounds are not always the same thing.

第部分：字母和发音并不总是一回事。

We also have another radio station, called " KNBC." Usually radio and television stations have four letters.

我们还有另一个广播电台，叫做“KNBC” 。 通常电台和电视台有个字母。

It was too simple. It had just four basic components, called nucleotides, which was like having an alphabet of just four letters.

它太简了，主要由4个被称为核苷酸基本物质组成。这就好比一个只有4个字母字母表。

And then we hear it's on City Road, then the road to the right and we see three, oh actually four letters there.

然后我们听到它在城市路，然后是路右侧，我们看到三个，哦，实际上是个字母。

The call signs in the U.S. all have four letters for the radio and TV stations, or almost all of them.

美国呼都是广播电台和电视台个字母， 或者几乎全部。

As early as the 1970s, geneticists were transforming the four letters of DNA sequences into tunes that were, well, not exactly chart-topping.

早在 20 世纪 70 年代，遗传学家就将 DNA 序列个字母转化为曲调，嗯，并不完全是排行榜上佼佼者。