VOA慢速英语:For Foreign Students, Top Choice in US: USC

例句：We meet on a regular basis.
      我们定期会面。

       That sort of thing is quite occasional and not regular.
       那种事十分偶然, 没有规律。

2.instructor n.指导者,教师

例句：He was invited to sit on the rostrum as a representative of extramural instructors.
      他以校外辅导员身份,被邀请到主席台上。

      He doesn’t suffer fools gladly so he’s hardly the best person to be instructor on the beginner’s course.
      他对傻里傻气的人没有耐心,因此他不太适合做基础课教师。

3.mainland n.大陆

例句：Ferry services operate between the islands and the mainland.
      在大陆和各岛之间有轮渡服务。

      They have relatives on the mainland.
      他们在大陆有亲戚。

4.recommend v.劝告, 建议

例句：I recommend caution in dealing with this matter.
      我建议慎重处理此事。

      He recommends wearing safety equipment.
      他建议佩戴安全装备。

5.appeal a.感染力, 吸引力

例句：This kind of music hasn't much appeal for me.
      这类音乐对我没有吸引力。

6.tuition n.学费

例句：Her yearly tuition is $2, 000.
      他一年的学费是两千美元。