五个到位安全管理
five arriving safety management
不动产资本市场的四个方向
Four quadrants of the real estate capital markets
电动三位四通阀
electric three-potential four-way valve
二位四通阀
two-position four-way valve
二亚磷酸双酚A四个(二乙二醇单丁醚)酯
bisphenol A tetra(diethtylene glycol monobutyl ether) diphosphite
国家医改四个体系
Four Systems of State Health Reform
划清四个界限
delimit the four boundaries
经过四个月的调查
after four months of investigation