revolve, evolve, involve

　　revolve v.旋转，转动。

　　The room began to revolve , then he fainted.屋子开始旋转，然后他就昏倒了。

　　evolve v.发展，演变。

　　Agriculture evolved slowly over thousands of years.几千年来，农业发展得很缓慢。

　　involve v.需要，包含;使卷入，牵涉。

　　Getting a drivers licence involves learning how to drive, studying the rules of the road, and taking a test.要得到驾驶执照需要学习开车，学习交通规则，还要经过考试。