mindmap root((要求)) demand implies peremptoriness and insistence and often the claiming of a right to make requests that are to be regarded as commands: the physician ~ed payment of her bill. claim implies a demand for the delivery or concession of something due as one's own or one's right: ~ed to be the first to describe the disease. delivery提交concession承认，如承认败选演讲concession speech是承认自己败选 require suggests the imperative quality that arises from inner necessity, compulsion of law or regulation, or the exigencies of the situation: the patient ~s constant attention. exact implies not only demanding but getting what one demands: ~ a promise from a friend.