n (sports) a stroke that puts the ball in play
n (Middle Ages) a person who is bound to the land and owned by the feudal lord
v serve a purpose, role, or function
v do duty or hold offices; serve in a specific function
v contribute or conduce to
v be used by; as of a utility
v help to some food; help with food or drink
v provide (usually but not necessarily food)
v devote (part of) one's life or efforts to, as of countries, institutions, or ideas
v promote, benefit, or be useful or beneficial to
v spend time in prison or in a labor camp
v work for or be a servant to
v deliver a warrant or summons to someone
v be sufficient; be adequate, either in quality or quantity
v do military service
v mate with
v put the ball into play
v. (为…)服务( serve的第三人称单数 ); 任(职); 提供; 端上