Now let's look at the first use case.

现在我们来看第一个用例。

youdao

The steps in the first use case are as follows.

第一个用例中的步骤是。

youdao

The first use of harebrained dates to 1548.

Harebrained的用法最初见于1548年。

youdao

These included the first use of "hard hats" to protect the workers' heads and special glasses to protect their eyes.

VOA: special.2010.07.23

But it's not the first use of the term "bug."

但是这并不是bug这个词的第一次使用“

麻省理工公开课 - 计算机科学及编程导论课程节选

So, regardless of the type of wave that we're talking about, there's some common definitions that we want to make sure that we're all able to use, and the first is amplitude.

所以，不管我们讨论的,是哪种波，它们都有一些我们,能用到的共同的定义,其中第一个就是幅值。

麻省理工公开课 - 化学原理课程节选

It was the first use of compulsory licensing under Indian patent laws passed in 2005.

NPR: India Rejects Bayer Plea Against Cheap Cancer Drug

This milestone in aeronautical history marks the first use of the sextant in air navigation.

UNESCO: MEDIA SERVICES

It is also significant as it may also have seen the first use of artillery in warfare on English soil.

BBC: War of the Roses enactment