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

玛莎，这些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?

三个来四封信 这第一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.

现在他们找到好几个两个一样符号的 四个字的字。

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

我听到最后四个字dubba-you，ex，why，zee。

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

这个遗传密码由简单的字表组成，四个字，A，T，C和G （碱基）。

" Fast" has four letters and four sounds.

“快”有四个字和四个声音。

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

想象一下， 如果英文字表有四个字会什么样子。

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个字的单词。

And that's one four letter word that most people don't like.

那一个大多数人不喜欢的四个字的词。

And it's just a cool four letter word.

这只一个很酷的四个字单词。

So what we require four words for, French manages with four letters.

所以我们需要四个单词来表达的，法语只需要四个字就能搞定。

Four letters four words. Four letters four words.

四个字四个词。四个字四个词。

Takeaway four, letter writing is a hobby.

第四点，写信一种爱好。

The first four letters, S-E-A-M, when used on their own, form a noun.

前四个字S-E-A-M单独使用时，构成一个名词。

Can you fit that into your four letter code?

你能把它放入你的四字代码中吗？

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

所以这个星球上的所有生命都由 ATCG 构成的，即 DNA 的四个字。

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

嘿, 什么四字的切割词?

Ziggy had scrawled four letters across the page.

齐吉在页面上涂鸦了四个字。

Sometimes three or four letters together can make one sound.

有时三个或四个字在一起可以发出一个声音。

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

我们还有另一家广播电台，叫做“KNBC” 。 通常广播和电视台的呼号有四个字。