Scientific opinions are not carved on tablets of stone; they change over the years.科学观点并非一成不变;它们随着时间而改变。...the different challenges of their career, their need to change, to evolve, blah blah blah.他们的职业面临的各种不同的挑战，需要求变，需要...
He laughed it off with aristocratic indifference.他带着贵族式的漠然对其一笑置之。She had an impeccable aristocratic pedigree.她有纯正的贵族血统。Of course you're the most aristocratic of the two of us.你当然是我们两个人中最有贵族气派的....