v. 认识；承认；察觉（recognize的ing形式）

v accept (someone) to be what is claimed or accept his power and authority

v be fully aware or cognizant of

v detect with the senses

v perceive to be the same

v grant credentials to

v express greetings upon meeting someone

v express obligation, thanks, or gratitude for

v exhibit recognition for (an antigen or a substrate)

v show approval or appreciation of