Yeah. I used it on cotton first.

是的，我刚开始在棉花上用了它。

Did you want to use the sink first?

你想先用盥洗室吗？

What year did she first use it?

她第一次使用这个短语是在哪一年？

I'll use the lavatory first, if you don't mind.

要是不介意，我先去趟洗手间。

Which things on the table do you use first?

你应该先用餐桌上的哪些东西？

You could also use " first of all" or " firstly" .

你还可以用“first of all”或“firstly”。

I asked you when face masks were first widely used.

我之前问你口罩什么时候被第一次广泛使用。

Again, the main thing is: Use " First" for the first step, and " Finally" for the last step.

使用“首先”作为第一步，使用“最后”作为最后一步。

The bombing was the first ever use of a nuclear weapon.

广岛原子弹也是历史上首次使用核武器。

You could use " first of all" or " firstly" , something like that.

你可以用“first of all”或“first”，诸如此类。

In fact, it may have been used in those sports first.

事实上，它可能最先被用于那些运动项目。

Last month, the FAA approved the first overland use of commercial drones.

上个月，联邦航空管理局批准了首次商业无人机陆上飞行。

It's basically saying when something is bought first, it's used first.

基本上它的意思是说如果某物是先买进的，那么就先使用它。

It used a SpaceX capsule, a first for a private company putting humans into orbit.

美国宇航局使用了SpaceX的太空舱，这是私人公司首次将人类送入轨道。

For schools in Portland, the pandemic has marked the first official use of outdoor learning.

对于波特兰市的学校来说，疫情标志着首次正式实施户外学习。

It was his debut at the U.N. Addressing world leaders, Trump used the words America first.

这是特朗普首次在联合国发表演讲。在面向世界领导人讲话时，特朗普使用了“美国优先”这种说法。

Unlike the hurricane system of strictly using first names of people, typhoon-naming goes a bit differently.

不像谨循人名的飓风命名系统，台风命名有点不一样。

Passchendaele, we once drove up--Passchendaele was one of these places that they first used poison gas.

帕斯尚尔 我们曾经驾车去过它是最先使用毒气的几个地区之一。

This is the first recorded use of " Zhong Guo" , the modern Chinese word for " China" .

这是关于“中国”一词最早的文字记载。

Like many terms that compare two things, you can use the first as or leave it out.

和许多比较两种东西的短语一样，第一个" as（像）" 可以用，也可以省略掉。