短语词组短语prothoracic theca 前胸鞘theca tumor 膜瘤reflecting theca 反光膜breast theca 胸甲theca interna 内膜层theca vertebralis 翻译;硬脊膜dural theca 硬膜囊sperma theca 纳精囊theca externa 外膜层 返回 theca