每天十组表达，中大网校帮你日积月累应考，轻轻松松过关！
country upgraded to city 县改市
country-level city 县级市
unregistered employment 隐性就业
recessive unemployment 隐性失业
invisible income; off-payroll income; side money 隐性收入
roller coaster 游乐场过山车
sister city 友好城市
re-employment service center 再就业服务中心
noise abatement 噪声治理
capitalization process of housing distribution/allocation 住房分配货币化进程

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