机译:南方四个珠江三角洲城市PM2.5和PM10中离子种类的特征
School;
of;
Chemistry;
and;
Chemical;
Engineering,;
Sun;
Yat-sen;
University,;
Guangzhou;
510275,;
China.;
Department;
of;
Civil;
and;
Structural;
Engineering,;
The;
Hong;
Kong;
Polytechnic;
University,;
Hong;
Kong;
State;
Key;
Laboratory;
of;
Loess;
and;
Quaternary;
Geology,;
Institute;
of;
Earth;
Environment,;
Chinese;
Academy;
of;
Sciences,;
Xi';
an;
710075,;
China;