be ready to assist someone whenever possible
听某人吩咐
be available to assist someone
可以给某人帮助
in or available for use
在使用；可供使用
(dated)employed as a servant
(旧)当仆人
not available for use
不可使用
serve in the armed forces
参军服役
he saw service in both world wars.
两次世界大战他都服过兵役。
(Brit. dated)become a servant to or worker for
(英,旧)为…帮佣；为…工作
government officials took service with the new rulers.
政府官员为新的统治者工作。