chemical tree化学树chemicaladj.化学的n.药品；化学物chemical nature of hormones激素的化学性质chemical selective membrane化学选择膜Chemical kinetics reduction化学动力学简化chemical plaiting of copper化学镀铜chemical engineering school化学工业学校Chemical Laboratory Company化学实验连chemical engineering device化工装置chemical processing reactor化工辐照用反应堆chemical deposition coating化学沉积包覆chemical preparation method化学制备方法