Frankly, when I sat the back of the classroom, I can't see the words on the board clearly.

坦率地说，当我坐在教室后面时，我看不清黑板上的字。

youdao

There was complete anarchy in the classroom when their usual teacher was away.

任课老师不在时，班上一片混乱。

《牛津词典》

Everyone would stand up when the teacher entered the classroom.

老师走进教室时大家都会起立。

《牛津词典》

This might be hard to do when the teacher is writing on a board at the front of the classroom.

VOA: special.2009.09.06

When I ask for classroom discussions, I'm going to have one of the T.A.S go to you with a microphone much like in "Donahue" Or something. Okay.

当我们进行随堂讨论时,我会请一位助教拿着麦克风到你那,就想多纳休那样

耶鲁公开课 - 博弈论课程节选

Who knew that I would one day look back with fond nostalgia to my elementary school days when the teacher blew a whistle in the classroom and we all practiced ducking and covering under our desks as a response to the coming nuclear war?

FORBES: No Food, No Drink If Agroterrorism Hits USA

Our future is determined each and every day, when our children enter the classroom, ready to learn and brimming with promise.

WHITEHOUSE: Weekly Address: Education for a More Competitive America & Better Future | The White House

Later, silence gripped the classroom when she recalled a local woman who waited too long for cancer treatment, leaving her children behind.

FORBES: Immigrant Health Messengers Jump the Culture Gaps