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

We know we need to divide by 266, 266 but what we need you to help us with is to figure out this top number here and see how many particles are going to backscatter. So if the TAs can come up and quickly hand out 1 particle to everyone.

知道背散射的概率就可以了，我们知道要除以,但还需要你们来搞清楚,分子上的数是多少，有多少个发生背散射的粒子,助教们请过来,把这些球分给同学们。

麻省理工公开课 - 化学原理课程节选