Other kinds of classes – for example, language classes – will be much smaller so that students can practice language. In general, American professors are informal and friendly with their students, and, as much as possible, they expect and invite participation in the form of discussion. A lar...
1 :to improve or polish as if by brushing. 2 : to renew one's skill in brush up your Spanish. intransitive verb. : to refresh one's memory : renew one's skill brush up on math. Other Words from brush up More Example Sentences Learn More About brush up. Has been called off meaning?