It could be positive or negative or complex, but it's just an ordinary number.

它可以是正数,负数或者复数,但它仍然只是一个普通的数

耶鲁公开课 - 基础物理课程节选

There's not really plural form of verbs in Korean, so then again it's also difficult.

韩语中真地没有动词复数形式，所以这一点也比较难。

韩国人经常犯的失误 - SpeakingMax英语口语达人

We don't want to use it in that case.

而我们并不想要得到复数

耶鲁公开课 - 金融市场课程节选

Notice, it's Prisoners, plural.

注意一下,囚徒是复数形式

耶鲁公开课 - 博弈论课程节选

So the Diadokhoi, the Greek plural of Diadochi, as we often refer to it, ended up splitting his army into four parts and four dynasties descending from the four successors.

所以这四个Diadokhoi，也就是Diadochi的复数形式，我们通常用这个词，最终将他的军队分割为四个部分,由此产生了四个王朝。

耶鲁公开课 - 新约课程节选