VOA慢速英语:Online Degree Programs Face Barriers to Success

1.complete vt.完成，使完满; 完成或结
例句：That is the minimum number necessary to complete the circuit.
这是完善循环的最低限度人数。

2.substitute vt.代替，替换，代用
例句：They were substituting violence for dialogue
他们在用暴力取代对话。

3.convenience n.方便，便利; 便利设施
例句：He was happy to make a detour for her convenience.
为了她方便，他很乐意绕道。

4.change vt.改变，变更; 交换
例句：People like to change things around to suit themselves.
人们喜欢改变周围的事物，使之适合自己。

5.operate vt.操作; 经营; 运转; 管理
例句：The doctors decided to operate on the patient once.
医生们决定立刻动手术。

6.afford vt.提供; 买得起; 担负得起;
例句：I can afford neither the time nor the money for a trip.
我没有足够的时间和钱去旅行。