人工观测
Manual observation
man-made observation
manual measurements
conventional observation station
Artificial
manual obserration
artificial observation
Manual
化工工人
Chemical plant workers
trace element
Employees of chemical factory
Chemical industry workers
人工工作量模型
artificial work-load model
人工人口系统
artificial population systems
人卫观测站
satellite observation stations
GPS连续观测站
GPS continuous observation station
NEON国家生态观测站网络
NEON National Ecological Observatory Network