His brain operation caused a great transformation in his character.经过脑手术，他的性格大大改变了。I hope I never have to have a brain operation - it must be an appalling prospect.我希望自己不必做脑部手术，这种事想起来太可怕了。A brain operation may give him years of remission.脑手术可给他几年的缓解期。