Adding the prefix for created forlorn, meaning to be lonely or sad.

加上前缀“for”构成了“forlorn”，意为“孤独的”或“悲伤的”。

For example, ’Un is a very common prefix in the English language.’

例如，在英语语un很常见的前缀。

Students could focus on prefixes that are used to give a word an opposite meaning.

学生很有可能会关注词语的前缀来获得相反的意思。

In metric units, which of these prefixes means " billion" ?

以下的公制单位，哪前缀表示" 十" ？

No, Neil, though it does have the same prefix – 'micro'.

不，尼尔，虽然它们有相同的前缀" 微" 。

Prefixes are letters we add to the beginning of a word.

前缀我们添加到单词开头的字母。

Adding a prefix to a word makes a new word with a new meaning.

给单词添加前缀会造具有新含义的新单词。

So we create new words by adding prefixes and suffixes to the root word.

我们通过向词根添加前缀和后缀来创造新词。

They don't normally occur as words on their own. But occasionally they do.

这些前缀通常不会自己作单词用，但确实偶尔也会。

Or he's very 'pro' something -- well they're prefixes which have suddenly become different words.

或者他非常‘pro’...这些可以使单词突然变得不同的前缀。

These prefixes are in order of thousand, million, billion, and trillion with giga denoting billion.

上述前缀按顺序分别表示千、百万、十和万，其giga表示十。

The prefix in can change the meaning of a word into its opposite.

前缀 in 可以把词的意思变成它的反义词。

On the other hand, adeno- means gland.

而腺癌词的adeno-前缀意指腺体。

IN- is a negative prefix that means no or not.

IN-否定前缀，表示没有或没有。

But in- is also a common negating prefix, leading to the second interpretation.

但in-也常见的否定前缀，于引出了第二种释义。

It's biathlon, so I hear the phrase prefix bi, which means two.

它冬季两项，所以我听到前缀“bi”这词，意思两项。

This re- prefix means to do something again.

这“re-”前缀表示再次做某事。

But if it's UNI, it stands for one.

但如果前缀UNI，它代表“”。

And the whole God thing, that was just PR back in e e day.

还有神明什么的 只前缀而已。

So we have " usual" means ordinary, I put the prefix in, it means not ordinary.

我们有“寻常的”，意思普通的，我把前缀放进去，变成不寻常了。