A diet deficient in vitamin D may cause the disease rickets.缺少维生素D的饮食可能导致软骨病.Richs'dog may receive the milk that a poor child needs to avoid rickets.富人的狗可以得到穷人的孩子为了避免软骨病而必须饮用的牛乳.Rickets can cause bone pain and weakn...
人生就应该是快乐的，要抓住每一天，孩子们，让你们的生活变得非凡起来。Carpe diem. Seize the day, boys. Make your lives extraordinary.你们的产品和服务有竞争力吗？营销又怎么样呢？Are your products and services competitive? How about marketing?你们的冷热水管包好隔热层了吗？Are your hot and cold ...