respiratory
  (a.)呼吸的
  res·pi·ra·to·ry /ˈrɛsp(ə)rəˌtorɪ, rɪˈspaɪrə, ˌtɔr-/ 形容詞
  呼吸的,呼吸作用的
  Re·spir·a·to·ry a. Physiol. Of or pertaining to respiration; serving for respiration; as, the respiratory organs; respiratory nerves; the respiratory function; respiratory changes.
  Respiratory foods. Physiol. See 2d Note under Food, n., 1.
  Respiratory tree Zool., the branched internal gill of certain holothurians.
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  respiratory
       adj : pertaining to respiration; "respiratory assistance"