maintain
动词 maintain:
keep in a certain state, position, or activity; e.g., "keep clean"
keep in safety and protect from harm, decay, loss, or destruction
同义词:conserve, preserve, keep up
supply with necessities and support
state categorically
同义词:assert, asseverate
have and exercise
maintain for use and service
同义词:keep
maintain by writing regular records
同义词:keep
state or assert
同义词:defend
support against an opponent
同义词:uphold
observe correctly or closely