關於Bark的文學百科

• 聽力美文《Why Dogs Bark?》

• Haveyoueverwonderedwhydodogsbark?Intermsofevolution,therehastobeareasonforbarking,oritprobablywouldn’tbethere.Isittowarnofpredators?Butdogsbarkwhentherearenopredatorsaround.Isitplay?Somedogsplaywithoutbarking.Infact,peoplewhostudycaninebehaviorfindt...
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