VOA慢速英语:Getting a Free Education, in Huge Online Classes

2. provide vt. 提供
例句：On Sundays his landlady provided dinner as well as breakfast.
星期天,他的女房东不但供给早餐,还供给晚餐。

3. credit n. 借款; 贷款
例句：They established a credit for 100, 000 dollars in favour of me.
他们给我10万美元贷款来帮助我。

4. requirement n. 要求, 要求条件, 必要条件
例句：He has filled all requirements for promotion.
他已具备晋升的一切条件。

5. engage vt. 使从事,使忙于
例句：He was busily engaged in painting the furniture.
他忙于油漆家具。

6. cover vt. 包含;适用于
例句：His reading covers a wide range of subjects.
他阅读的书籍涉及多种学科。

7. grade vt. 将...分等级;将...分类; 给...评分
例句：The pearls are carefully graded.
这些珍珠的等级分得很细。

8. accessible adj. 容易取得的，容易获得的，容易达到的
例句：Medicine should not be kept where it is accessible to children.
药物不应放在容易被小孩拿到的地方。

9. format n.设计, 安排；格式, 样式, 版式
例句：They are producing books in all kinds of different formats.
他们出版各种不同开本的书籍。

10. recognize vt. 承认[认清](某事物); 认识到
例句：He recognized that he was not qualified for a teacher.
他认识到自己没有资格担任教师。