我们教室前面有块大黑板。（黑板是不是属于教室里的？）

There is a big blackboard in front of our classroom.

youdao

坐在后排的学生可能不会讲太多，但在大教室里，可能很难看到黑板，也很难听到老师在说什么。

At the back, students probably won't speak much, but in big classrooms, it can be hard to see the board and hear what the teacher is saying.

youdao

老师像皇帝一样坐在高高的讲台上的大椅子上，身后是黑板。

The master sat throned in his great chair upon a raised platform, with his blackboard behind him.

youdao

Well, I'm going to write on the board, "shield equals moon," and you can schematize it with, let's say, "A equals A'." A'?

我会在黑板上写下“屏障和月亮一般大“,你们可以在脑海里概括一下，“两者相等“？

耶鲁公开课 - 弥尔顿课程节选

Just staring at the board, which is of these is bigger?

参照着黑板说,哪个值更大

耶鲁公开课 - 博弈论课程节选