pfda 基本解释 Pure Food and Drug Administration (美国)食品及药物管理局(正式名称为Food and Drug Administration,略作FDA) 同首字母单词 p [pi:] pa [pɑː] paal [pɑːl] paba pablum ['pæbləm] pabouche [pɑː'buːʃ] pabulum ['pæbjʊləm] pabx pac [pæk] paca ['pækə] pacchionian pace [peɪs]