短语词组短语pear green aphid 梨日本大蚜pear yellow aphid 梨黄圆尾蚜frosted pear aphid 梨降霜蚜woolly pear aphid 梨根绵蚜green pear aphid 梨绿蚜Beijing pear aphid 梨北京圆尾蚜 返回 pear aphid