【电学】交流/直流系统内联【电学】交流／直流系统互连

coagulation cascade system

clearing house automated payments system【金融】

somatic nervous system【解剖】

interactive geometrical design system

tetragonal system

debug support system verb description【计】

gastro-entero-pancreatic endocrine system【组织】;GEP system【组织】;

security management system【计】