1 to look over

2 to examine

3 to check up

4 to ferret out

1 to examine

2 to investigate

3 to censor out

4 censorship

1 surname Zha

1 to find out

2 to discover

1 to search for

2 to look up

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

2 taking information from all sides

1 to be the most ridiculous thing in the world (idiom)

1 complete nonsense (idiom)

1 studying the old to promote the new (idiom)