In a help session what he might do typically is solve between four and eight problems that illustrate the key principle being talked that week.

在帮助课程中他一般会,解决4到8个问题,来阐明那一周教的关键原理。

麻省理工公开课 - 媒体、教育、市场课程节选

If you're getting these compilation errors, well, -- when you compile, notice there's a number of key help -- the number of helpful tidbits here.

如果你们得到了这些编译错误，当你编译的时候，注意这里有很多关键帮助-,这里很多帮助信息。

哈佛公开课 - 计算机科学课程节选