And what that means it's there's all sorts of precautions and procedures you take that are special when you deal with these.

这意味着当你与它们打交道的时候,你需要做各种各样特别的防范措施与流程。

麻省理工公开课 - 化学原理课程节选

But the second one says "exam instructions and logistics."

而第二份讲义上写的是“考试说明与流程“

麻省理工公开课 - 化学原理课程节选