The writer seems to vacillate between approving of Collins’ actions and finding them disgusting.对柯林斯的行为,作者一会儿赞成,一会儿又厌恶,看来还拿不定主意。The longer you vacillate the less time you'll have to do anything worthwhile.你越是犹豫,余下来做有价值的事的时间就越少。The earthquake caused the entire house to vacillate.地震使整个房屋摇晃。We cannot vacillate on the question of the party's leadership.在党的领导权问题上我们不能动摇。