成洞身体组织或器官内空洞的形成，尤指那种因肺结核而在肺中形成的空洞 The formation of cavities in a body tissue or an organ, especially those formed in the lung as a result of tuberculosis.
那栋旧房子荒凉空洞地伫立着，像一堆废墟。 The old house stood gaunt and empty, a complete ruin.
他就人权问题提出的抗议听来很空洞。 His protests on human rights sound hollow.
