1. 熊猫   hyena   panda   whale   seal   Hint Half-n-half Clue   2. 北美野牛   bat   ox   hyena   bison   Half-n-half Clue   3. 驯鹿   porcupine   dolphin   reindeer   octopus   Half-n-half Clue   4. 大猩猩   gorilla   koala   mare   shark   Half-n-half Clue   5. 水獭   hippopotamus   otter   jackal   dolphin   Half-n-half Clue   6. 封印   jackal   seal   bulldog   hippopotamus   Half-n-half Clue   7. 牛   seal   panther   hippopotamus   ox   Half-n-half Clue