(d) There should be only two categories of contract: indefinite contracts for the career staff performing core functions, and fixed-term contracts for staff working in other functions (short-term assignments, projects, etc.);
(d) 合同只应分为两类：从事核心工作的终身从业工作人员的无限期合同；和从事其他工作的工作人员的定期合同（短期任务、项目等）；