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...
His contribution is immeasurable.他居功至伟。Nursing produces an emotional closeness between a mother and her child that has immeasurable value.哺乳可促使母子间的感情亲密,其价值是无法衡量的.It was there before him, around him, everywhere , illimita...