So, increase your vocabulary by using a negative prefix.

所以，通过使用否定前缀来增加你的词汇量。

He uses the in- prefix meaning 'not'.

他使用 in- 前缀表示“不” 。

The opposite of " tangible" uses the prefix " in-" again, so it's " intangible."

“有形” 的反义词又用了前缀“在-” ，所以是“无形” 。

You can also describe ages using the prefix " late." He's in his late eighties.

您还可以使用前缀“晚”来描述年龄。他已经八十多岁了。

OK, now we're going to look at ways of making opposites by using prefixes.

好的， 现在我们将研究使用前缀进行对立的方法。

So that one's just a case of people using the wrong prefix on the word.

所以这只是人们在单词上使用错误前缀的情况。

Another word we use this prefix in front of in a special way is " trailer."

我们以特殊方式在前面使用此前缀的另一个词是“trailer” 。

You have to know which is the right one to use; you can't just use any negative prefix with any word.

您必须知道哪个是正确的；你不能只对任何词使用任何否定前缀。

Another way you can make your language more formal is to use the prefix re- to indicate a repeated action. This doesn't apply to all verbs.

使语言更正式的另一种方法是使用前缀 re- 来表示重复的动作。这并不适用于所有动词。

When shorter carbon chains are attached to longer ones like this, they're still named using the same prefixes, but we stuff a little -yl onto the end to show that they're just attachments.

当较短的碳链像这样连接到较长的碳链上时， 它们仍然使用相同的前缀命名，但我们在末尾加了一点 -yl 以表明它们只是附件。