Even though these are two different words, the hyphen makes it one word.

即它们是两个不同的词，字成为一个单词。

'Ultra' is added to adjectives, using a hyphen but not always.

ultra 被在形容词上，会用字，但并不一定总是这样。

If you have used bullets, replace them with hyphens.

如果你用了项目号，把它们换成字。

And we usually write this with a hyphen between 'quick' and 'fire'.

们通常会在“quick”和“fire”间上字。

That's right. So you write a 'seventy hyphen second' lap. A 'six hyphen foot' man.

是的。所以你写 seventy-second lap 或者 six-foot man。

So a word like open-minded is joined together by a hyphen.

所以像 open-minded 这个用字接的词。

A hyphen is needed when a unit of measurement acts as an adjective.

当度量单位作为形容词时，字。

In this week's program, we will explain how to use hyphens to make compound adjectives.

在本周的节目中，们将解释如何用字来构成复合形容词。

Notice that the noun form does not use a hyphen.

请注意这种名词形式不字。

In this week's program, we will learn some general rules for creating compound nouns with hyphens.

在本周的节目中，们将学习用字构造复合名词的一些基本规则。

In last week's program, we talked about using hyphens to create a compound adjective.

在上周的节目中，们讨论了如何用字来构造复合形容词。

No, hang on. Okay, one word, a letter and a number and... maybe a hyphen. 3D printer.

不，让想想。好吧，一个词、一个字母、一个数字、以及一个字号吧3D打印机。

Notice that both 15-foot and 10-foot come before the noun and there is a hyphen between the words.

请注意" 有15英尺高的" 和" 有10英尺高的" 都放在名词前，并且单词间有字。

You can say a three-week trip and here you don't need an s but you need a hyphen.

你可以说“三周的旅行”，这里你不需 s，但是你需字。

A hyphen is used to combine two or more words together.

字用于将两个或多个单词接在一起。

That's right, it has hyphens. Well done if you got those right.

是的，它是用字接的。如果你都答对了就很棒哦。

Do not confuse a hyphen with a longer dash (–).

不将字与较长的破折号（–）混淆。

This hyphen joins these two words and so they count as one word.

字把这两个词接起来，所以它们算作一个词。

We use hyphens with compound nouns so that the sentence is clear and understandable.

们在复合名词中用字，这样句子就清晰易懂了。

A hyphen (-) is used to combine two or more words together to create a compound word.

字（-）用于将两个或多个单词组合在一起以创建复合词。