to observe or inspect carefully or critically
to interrogate
to determine the aptitude, skills or qualifications of someone by subjecting them to an examination
to check the health or condition of something or someone
To search or examine with continued care; to seek diligently.
To make an extensive investigation into.
To search again.
Diligent inquiry or examination to seek or revise facts, principles, theories, applications, etc.; laborious or continued search after truth.
The research station that houses Wang and his team is outside Lijiang, a city of about 1.2 million people. File:The research station that houses Wang and his team is outside Lijiang.ogg