突发生态环境问题
Eco-environmental emergency
公共卫生突发事件
Sudden affairs of public health
public health emergency
emergent public health event
Emergency in public health event
核化生突发事件
NBC accident
Nuclear
chemical and biological emergency events
突发发射和接收
burst mode transmission and reception
学生突发事件
students’ unexpected Incident
城市生态发展水平
Ecological status of city
发生发育
occurrence and development
Initiation and development
origin and development
The genesis and development
发生发展
tumorigenesis and development
occurrence and development
发生发展规律
occurrence dynamics and development