1 to observe

2 to watch

3 to survey

4 to examine

5 observation

6 view

7 perspective

8 classifier: 个 gè

1 police

2 police officer

3 classifier: 个 gè

1 to investigate a crime

2 to scout

3 to reconnoiter

4 reconnaissance

5 detection

6 a scout

1 to explore

2 to survey

3 to prospect (for oil etc)

4 prospecting

1 to fail in observing or supervising

2 to miss

3 to let sth slip through

1 to examine tiny clues to know general trends (idiom)

2 to deduce the whole story from small traces

1 to weigh up sb's words and observe their facial expression (idiom)

2 to discern what sb thinks from his body language

1 open enquiries and secret search (idiom); to investigate openly and in secret

2 taking information from all sides

1 lit. seeing clearly the downy feathers of autumn (idiom, from Mencius)

2 fig. perceptive of even the finest detail

1 open enquiries and secret search (idiom); to investigate openly and in secret

2 taking information from all sides