So, assuming -- if anyone got it wrong because of that, that's my apologies, that's my fault.

如果有人是因为这个原因做错了，那我非常抱歉，这是我的错。

麻省理工公开课 - 化学原理课程节选

Secondly, as we go to the more advanced part of the course, we'll take a result from this part of the blackboard, stick it into the second part and keep manipulating, so if I screwed up in the beginning and you guys keep quiet, we'll have to do the whole thing again.

其次,随着我们课程的深入,我们需要把黑板这边的计算结果,抄到黑板的那边,不停地这么做,如果我一开始就写错了,而你们又不出声,我们就得全部重新来过

耶鲁公开课 - 基础物理课程节选