前者意思着重在,变化上。 range 是 between a and b, vary 是 from a to a. 比如 the temperature varies from day to day/ from place to place. 这里着重于变化。这个变化是取决于环境和个人的情况。 customs can vary from region to region, clothes can vary in colour and size. 如果涉及到数字,数据了,那么还是用range比较好。