basic ion正离子,碱离子,阳离子basicadj.基本的；基础的；初级的；含硅少的n.基础；根本；[计]BASIC语言basic principles of international law国际法基本原则Basic terminology of planetary drives行星传动基本术语Basic Statistics of Railway Transport铁路运输基本情况basic probability assignment function基本概率赋值函数Basic geographic information database基础地理数据库basic structure of wardship apparatus监护仪的基本结构Basic principles of CDMA technologies扩频通信Basic Stepping Motor Control Circuits步进电机基本电路basic type Chinese terminal equipment基本型汉字终端设备Basic solution for liquid fertilizers液肥溶液