hear of 和hear about 区别
hear about表示只是听说知道而已，hear of表示听说，而且是非常了解。
hear是指主观听到，而hear about是指间接听到，两者的听到顺序不同。
She was surprised to hear about her mistake.
听到自己犯的错误，她感觉很惊讶。
You hear talk about American business being flabby.
你会听到有关美国经济发展无序、后劲乏力的议论。
I\'ve always wanted to be an actor but Dad wouldn\'t hear of it
我一直想当个演员，但爸爸不同意。