一等奖学金用英语称为“first-class scholarship”。这个词由两个单词构成：“first-class”和“scholarship”。“First-class”指的是排名最高的，最优秀的，而“scholarship”指的是奖学金。

举个例子，你可以说：

I was awarded a first-class scholarship to study at Oxford University.

She received a first-class scholarship for her outstanding academic performance.

通常来说，一等奖学金会由学校或大学提供，用来奖励在学业方面表现优秀的学生。这类奖学金通常会提供较高的金额，并且可能还包括其他福利，如免费住宿和膳食等。