I am not prepared to see children in some parts of this country having to settle for a second-class education.

我不愿看到在这个国家部分地区的儿童们只能勉强接受次等的教育。

《柯林斯英汉双解大词典》

I am sure you all know from physics class about how light moves in microscopic ways and that we can only see light when the wavelength of that light is in a specific range.

我相信，你们在物理课上都学过光是如何以微观的方式运动的，以及只有在光的波长在特定的范围内时我们才能看到光这一事实。

youdao

As I hear individuals, I am able to hear problems, point them out to the class (not in a critical way), and we are able as a class to make corrections to eliminate that problem.

在我听单个学生的时候，我能够听出问题，在全班指出问题(不是刻薄的方式)，我们就能全班作出改正，消除那个问题。

youdao

She said,"Am I losing it?" Emma Cleveland was teaching a class in mathematics at a college.

VOA: special.2009.10.25

It's basically--if I am told that you're a genius and your genius is about to be in full-flower throughout this class and it's a small class as these classes were, I'll focus more on you, I'll give you more of my attention.

它其实…如果有人告诉我你是天才,你的才智能在这节课上完全体现出来,这个班的人不多，我就会把更多的注意力放在你身上。

耶鲁公开课 - 心理学导论课程节选

Am I going to a class? Oh no. Ok, so the program that I'm in is, it's a program for undergraduate.

去上课？不是。我参加的是一个本科生的项目。

去学校聚会的路上 - SpeakingMax英语口语达人

Several years ago, I enrolled in a leadership class that challenged me to find out who I am, what drives me to succeed, and what might bring balance and fulfillment to my life.

WHITEHOUSE: Saving Lives On and Off the Job

Instead, I am in the "precariat", which means I am likely to come from a working class background.

BBC: Class calculator: A US view of the class system