One costs $50 a dose and the other close to $2,000.

其中一种一剂药的价格是50美元，另一种则接近2000美元。

youdao

youdao

A dose of flu kept me off work.

一场感冒使得我上不了班。

《牛津词典》

The first twenty percent of the vaccines will sell for seven dollars a dose.

VOA: special.2010.03.29

So, even if the cost is small, $10 a dose, it quickly amounts to a large amount of money.

因此,即使单只成本很小,可能只有十美元,但是这很快就会累积成为很大的金额

耶鲁公开课 - 生物医学工程探索课程节选

Give enough of the vaccine so you have a dose for everybody in the world, or a large fraction of the people.

疫苗的数量,足以让世界上每个人都接种一支,或者让绝大多数人都能接种一支

耶鲁公开课 - 生物医学工程探索课程节选

However, it's not clear whether such a dose could get past the FDA on its own.

FORBES: Eli Lilly's Big Battle

But once Sarah Palin got a dose of it, they were all over it.

NPR: Candidates Vie For Female Voters' Attention

That person can offer a dose of reality and will look out for your best interests.

FORBES: Stop Before You Sign & Get A Good Lawyer