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

我听到最后四字是dubba-you，ex，why，zee。

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

玛莎，这些是给我家乡的亲友的信件......四封信！

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

三月来四封信 这是第封提到凯萨琳琼斯的？

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

现在他们找到好几样符号的 四字的字。

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

这遗传密由简的字表组成，四字，A，T，C和G （碱基）。

Can you fit that into your four letter code?

你能把它放入你的四字中吗？

Sometimes three or four letters together can make one sound.

有时三或四字在起可以发出声音。

And it's just a cool four letter word.

这只是很酷的四字词。

" Fast" has four letters and four sounds.

“快”有四字和四声音。

Ziggy had scrawled four letters across the page.

齐吉在页面上涂鸦了四字。

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

想象下， 如果英文字表有四字会是什么样子。

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

嘿, 什么是四字的切割词?

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

所以这星球上的所有生命都是由 ATCG 构成的，即 DNA 的四字。

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四字的词。

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

第四部分：字和发音并不总是回事。

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

我们还有另广播电台，叫做“KNBC” 。 通常电台和电视台有四字。

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被称为核苷酸的基本物质组成。这就好比只有4字的字表。

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，然后是路的右侧，我们看到三，哦，实际上是四字。

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

美国的呼号都是广播电台和电视台的四字， 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，遗传学家就将 DNA 序列的四字转化为曲调，嗯，并不完全是排行榜上的佼佼者。