You can stop me any time and you should not feel somehow you are stopping the progress of the class.

你可以在任何时候打断我,而且你不必担心,你的问题就会打断课堂的进程

耶鲁公开课 - 基础物理课程节选

Your stopping me at any time is just fine.

但是你可以随时打断我

耶鲁公开课 - 基础物理课程节选