pled动词plead的过去式和过去分词形式PLn.分界线(合用线；有效负载；信号灯；金属板)Plicatulaplicatan.襞蛤Pleural neoplasm胸膜肿瘤Pleurotuseryngii杏鲍菇plethysmothallus大原植体pleomorphic male多形雄(粉螨)plica incudialis砧骨襞pleural centesis胸腔穿刺术plicate palmatae棕榈襞plies foundation桩基础plicae sigmoidea[医] 乙状襞