sexual intercourse 名詞
  性交,交媾
  In·ter·course n.
  1. A commingling; intimate connection or dealings between persons or nations, as in common affairs and civilities, in correspondence or trade; communication; commerce; especially, interchange of thought and feeling; association; communion.
  This sweet intercourse
  Of looks and smiles.   --Milton.
  Sexual intercourse, sexual or carnal connection; coition; copulation, especially between humans.
  Syn: -- Communication; connection; commerce; communion; fellowship; familiarity; acquaintance.
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  sexual intercourse
       n : the act of sexual procreation between a man and a woman; the
           man's penis is inserted into the woman's vagina and
           excited until orgasm and ejaculation occur [syn: intercourse,
            sex act, copulation, coitus, coition, sexual
           congress, congress, sexual relation, relation, carnal
           knowledge]