这是外加的东西。

This is sth. additional.

《新英汉大辞典》

这种外加的意念，其实都应该丢弃，因为寻求知识，完全是自己的事情，而和旁人不相干的。

All such extraneous considerations should be brushed aside, for the acquisition of knowledge is nobody else's business but one's own.

youdao

他们支付每天150元的报酬，外加加班费。

They pay $150 a day plus overtime.

《牛津词典》

You would probably not even think to say, pay me 3% interest plus the rate of inflation over the next year.

你甚至可能根本不会想到说，支付3%的利息外加来年的通货膨胀率。

耶鲁公开课 - 金融市场课程节选

We'll be talking about the Phaedo starting some time next week and we'll continue the discussion of the Phaedo for at least a bit of, maybe all of, the week after that.

我们会在下周开始讨论斐多篇,外加下下周的一部分时间,或者全部时间,继续,讨论斐多篇

耶鲁公开课 - 死亡课程节选