So hopefully, it was a time issue in terms of looking at the periodic table, because let's have you tell me what are we looking for here?

希望刚才大家出问题的原因,是因为看周期表有时间限制，请大家告诉我,我们在这里找什么？

麻省理工公开课 - 化学原理课程节选

But helping you understand things that really are a conceptual difficulty is what they're here for and what we're here for, so please come and talk to us.

不过他们在这儿,是为了帮助你们,了解概念非常复杂的问题，所以请过来请教他们。

麻省理工公开课 - 计算机科学及编程导论课程节选