【英语时差8,16】为何狗要咆哮

 In terms of evolution, there has to be a reason for barking, or it probably wouldn’t be there. Is it to warn of predators¹? But dogs bark when there are no predators around. Is it play? Some dogs play without barking. In fact, people who study canine² behavior find there isn’t much of a pattern to barking–it seems to be an all-purpose noise. Now here’s another fascinating thing: adult wolves don’t bark. They growl³, and they whine⁴, but no barking. And dogs evolved from wolves. So where did the bark come in? Mark Feinstein and Ray Coppinger of Hampshire College in Massachusetts have a theory. These biologists have noted⁵ that while adult wolves don’t bark, adolescents do. Wolf pup barking seems to be an intermediate noise you grow out of.

1 predators   

n.食肉动物( predator的名词复数 )；奴役他人者（尤指在财务或性关系方面）

参考例句：

• birds and their earthbound predators 鸟和地面上捕食它们的动物
• The eyes of predators are highly sensitive to the slightest movement. 捕食性动物的眼睛能感觉到最细小的动静。 来自《简明英汉词典》

2 canine   

adj.犬的，犬科的

参考例句：

• The fox is a canine animal.狐狸是犬科动物。
• Herbivorous animals have very small canine teeth,or none.食草动物的犬牙很小或者没有。

3 growl   

v.（狗等）嗥叫，（炮等）轰鸣；n.嗥叫，轰鸣

参考例句：

• The dog was biting,growling and wagging its tail.那条狗在一边撕咬一边低声吼叫，尾巴也跟着摇摆。
• The car growls along rutted streets.汽车在车辙纵横的街上一路轰鸣。

4 whine   

v.哀号，号哭；n.哀鸣

参考例句：

• You are getting paid to think,not to whine.支付给你工资是让你思考而不是哀怨的。
• The bullet hit a rock and rocketed with a sharp whine.子弹打在一块岩石上，一声尖厉的呼啸，跳飞开去。

5 noted   

adj.著名的，知名的

参考例句：

• The local hotel is noted for its good table.当地的那家酒店以餐食精美而著称。
• Jim is noted for arriving late for work.吉姆上班迟到出了名。