短语词组短语pectoral fin [鱼]胸鳍pectoral retractor 胸部牵开器;胸部拉钩Pectoral Fly 蝴蝶式扩胸pectoral veins [解剖]胸肌静脉;胸肌静脉mako pectoral 条纹状胸鳍pectoral muscles 胸肌;胸大肌Pectoral major 胸大肌endothoracic pectoral 胸肌膜Pectoral flower 胸花pectoral muscle 胸肌 返回 pectoral