犬科动物:canine,wolf,coyote,jackal,dog 猫科动物: feline,puma, lynx, tiger, lion, leopard, cat 表示情绪的词: happy,excited,scared,unsure,distress,boredlonely, upset 猫和狗的叫声: purr,meow, yowl, hiss,growl,whine,yip, bark, howl hunt for... 猎取·....·( 通常指食物或毛皮 ) a range of一系列; 一些 on average 平均; 普通 when it comes to... 当提到·.....就··.···而论 be related to 与.....·有关 倍数的表达方式，例如: That's twice as many as cats-and 40times more than humans! no matter +特殊疑问词”句型，例如: No matter who yourfavorite is, one thing is certain: Fur will fly in this battle of the pets! “too...to...”句型，例如: Some cat owners believe that cats aretoo smart to take orders from a human.