One class of drugs is called uppers.

一类毒品被称为兴奋剂。

After one class? I don't think so.

才一堂课？不会吧。

You can only take one class per day, every day.

你每天只能上一节课。

But after that one class, many students do not continue.

但修完一门课程后，很多学生没有继续修下去。

And they try to teach it all in one class.

“他们就会想要一节课全都交给学生。”

Yes, that's nine hours for one class every week.

是的，为了这节课，你每周需要付出9个小时的时间。

The researchers investigated one class sessions' impact on eating meat.

研究人员调查了一堂课对吃肉行为的影响。

I had not gone to one class since arriving in New York.

自从来到纽约，我没上过一节课。

There was one class that brought my tentative worries and concerns into focus.

有一节课让我暂时的忧虑和担忧得到了关注。

So coatings are a real concern because they contain one class of chemicals, the PFAS.

所以涂料是一个真正的问题，因为它们包含一类化学物质，PFAS。

He's got so much energy, this is one class you do not fall asleep in!

他的精力非常充沛，上他的课，你是不会想睡觉的！

We’ll be able to have a volleyball match, one class against another; that’ll be great fun.

我们可以举办一场排球赛了。

So football is important for social mobility - the ability to go from one class of society to another.

所以足球对社会流动性是很重要的--从社会的一个阶级变到另一个阶级的能力。

If an administrator is teaching one class, is that a shortage or is the administrator simply doing her job?

如果管理员在任教，这算教师短缺，还是说这是管理员分内的事？

One class of Janus words is particularly troublesome: those that mean different things on opposite sides of the Atlantic.

大西洋两岸意思不同的单词。

Children of the same age are in one class.

同龄的孩子分在一个班。

There can only be one class action.

案子就一个 我要跟你抢嘛。

And do you find that you have like an even distribution of those four types within any one class or...?

那你认为每个班的学生类型是平均分布的还是… … ？

Ms Jeon says she was sickened to see one class of justice for the rich and another for the poor.

全贞淑说，她对司法体系中贫富差别对待的状况深恶痛绝。

To pretend there was an impenetrably thick glass wall between us in the one class where we were forced together.

当我们被迫坐在一起上课的时候，假装我们之间有一堵无法穿透的，厚厚的玻璃墙。