pigeon-breasted
  (a.)凸胸的
  pi·geon-breast·ed /ˈpɪʤənˈbrɛstəd/ 形容詞
  Pi·geon-breast·ed a. Having a breast like a pigeon, -- the sternum being so prominent as to constitute a deformity; chicken-breasted.
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  pigeon-breasted
       adj : having a chest deformity marked by a projecting breastbone
             caused by infantile rickets [syn: chicken-breasted]