Colleges, then, can be two- or four-year institutions; universities are almost always four years plus often a master's and a Ph.D. program. Extension courses can be given at either at a community college – a two-year college – or a four-year university or college.

那么，大学可以是两年制或四年制的机构；大学几乎都是四年制， 通常还有硕士和博士学位。 程序。 扩展课程可以在社区学院（两年制学院）或四年制大学或学院提供。