“three-tier system”概念、定义、翻译-科学时代

单词	three-tier system
释义	请查阅three-tier system--three-tier system (importers, wholesalers and retailers)
随便看	planning blight planning budget planning curve planning cycle planning department planning director planning editor planning estimate planning fallacy planning for capital investment planning for capital investment planning force planning horizon planning land-use planning map planning map planning model planning of comprehensive water pollution control planning of surveys planning, organizing, staffing, directing, coordinating, reporting and budgeting （POSDCORB） planning permission planning phase planning, programming and budgeting system planning-programming-budgeting system Planning Programming Budgeting System

科学时代收录了1160609条科普词条，基本涵盖了常见科普常识及英语词汇的翻译，是科学学习和研究的有利工具。