Most expressions in Chinese about the dog, for example, "a homeless dog", "a mad dog", "a running dog" and "a dog catching a mouse", have bad meanings.

中文中关于狗的大多数表达，如“流浪狗”、“疯狗”、“走狗”和“狗抓老鼠”，都有不好的含义。

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They’ll think you’ve gone mad! They’ll scream ‘Mad dog’ and send you away.

莫德粗着嗓子说，“他们会以为你疯了，然后尖叫着‘疯狗’，就把你给赶出去了。

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Ancient Romans, it seems, believed that the bite of a mad dog could only be cured by burning the dog's hair and drinking it with water.

古罗马人似乎相信，被疯狗咬了以后，只能烧掉那只狗身上的毛，加在水里喝下去，才会治好。

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Nearby,on massive balloons, one can see the Colonel of a decade later, the man who backed extremists and terrorists, a pariah dubbed by the United States the "Mad Dog of the Middle East".

VOA: standard.2009.08.29

The most recent Mad Dog well was drilled by Australian mining giant BHP Billiton.

FORBES: Chevron And BP Reveal Big New Deepwater Finds In The Gulf Of Mexico

Some analysts think that BP's Mad Dog, Holstein and Atlantis fields hold another 2 billion.

FORBES: Going deep

The bum lay flat on his back with his Mad Dog balanced on his chest.

NEWYORKER: Fiction