hel·ot /ˈhɛlət/
  古代斯巴達奴隸,奴隸,農奴
  He·lot n.  A slave in ancient Sparta; a Spartan serf; hence, a slave or serf.
     Those unfortunates, the Helots of mankind, more or less numerous in every community.   --I. Taylor.
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  helot
       n : (Middle Ages) a person who is bound to the land and owned by
           the feudal lord [syn: serf, villein]