The features and running way of DCL are introduced briefly.介绍了DCL语言的特点及运行方式.In this paper , the fractal theory of floc structure is briefly addressed.絮体结构和强度特征是絮凝过程的重要参数.Cross sketched the story briefly, telling the fact...
石蕊: 从几种地衣类植物中获取的带色有机化合物的混合物.Litmus: Mixture of coloured organic compounds obtained from several species of lichens.地衣类植物生长速度慢,有好几年的寿命.其生长依赖于霉菌和海藻的共生.Lichens, which grow slowly and live for many years, result from fungi a...