This means the dog must stay down even if the owner or someone else tosses a ball in front of the dogs feet or drops a hot dog 4 feet from where he is lying.

这就意味着即使有人在狗儿面前扔出一个球或食物，狗儿也必须卧下不动。

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The impact of an asteroid at the moon's South Pole 4 billion years ago threw out a colossal surge of debris - like a dog furiously digging a hole in the sand.

这40亿年前发生在月球南极的小行星撞击抛出了一大片碎渣——就像一只狗疯狂地在沙地里刨洞一般。

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In the example in Listing 4, I extended Dog from the inside.

在清单4的例子中，从内部扩展了Dog。

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Many attended well-known attractions, like the Nathan's Famous July 4 International Hot Dog-Eating Contest.

WSJ: NYC's Coney Island hopes for rebound after Sandy

In 2004-2005, there was a total of 4, 540 dog attacks in the UK with 199 of those taking place in south Wales.

BBC: NEWS | UK | Wales | South East Wales | Mail campaign over dog attacks

Competitive eating has gone extreme in recent years, with globe-trotting contestants often taking top honors in events like Nathan's Famous International Hot Dog Eating Contest on July 4 at Coney Island in New York and Philadelphia's Wing Bowl in February.

WSJ: Extreme Cheeseheads Choke It Down