背诵为王 第 一 册 第 13 课

13 Dogs

People often say that a dog is man's best friend. Over thousands of years, man has taught his dogs to do many kinds of work besides guarding the home. For example, sheepdogs are famous for their ability to control a flock¹ of hundreds of sheep.

Dogs have been used to aid disabled people for centuries. A guide dog can lead its blind owner. Nowadays, dogs can be taught to turn on light switches², open refrigerator doors and dial the telephone for their disabled owners. For the majority of people, however, dogs are simply pets and friends for both young and old members of the family.

guard 看守，看护
sheepdog 牧羊犬
flock 群
aid 帮助
disabled 残疾人
century 世纪
guide dog 导盲犬
dial 拨
majority 大多数

狗

人们总是说狗是人类最好的朋友。几千年来，除了看家外，人类还教会了狗去做许多其他的事，例如，牧羊犬就因其可以控制数百只羊的羊群而出名。

狗用来帮助残疾人已有好几个世纪了。导盲犬可以为盲主人引路。现在，人们还教狗为残疾主人打开电灯、开冰箱和拨电话。然而，对于大多数人来说，狗只是家里老人和孩子们的宠物和朋友

1 flock   

n.羊群，一群，大量；vi.群集，聚集，成群

参考例句：

• A flock of customers were waiting for the store to open.一群顾客在等候着商店开门。
• A few sheep have been lost from the flock.羊群里少了几只羊。

2 switches   

n.转轨器，道岔；开关( switch的名词复数 )；改变；（铁路的）转辙器；（电路的）闸v.转变，改变( switch的第三人称单数 )；转换；挥动（棍棒、鞭子等）；迅速转动

参考例句：

• This button switches the current on. 这个电钮接通电流。 来自《简明英汉词典》
• The switches close the contacts and complete the circuit. 这些开关可使接触器接通电流形成回路。 来自辞典例句