Strip out nonalpha characters that are not whitespace (which messes up apostrophes, but it's a good place to start)

删除不是空格的非首字母字符（空格将搞乱省略符号，但是它是很好的起点）

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Hawking's main concern was that a fleet of alien spacecraft could turn up wanting to strip mine the Earth for its bountiful resources.

霍金的主要忧虑是一队外星人飞船舰队可能会突然出现，想要将地球上储量丰富的矿藏洗劫一空。

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"Things have gotten so bad that before the price of copper fell, people were breaking into boarded-up houses to strip them of their wiring," says Mark.

马克说，“事情已经变得非常糟糕，在铜价回落之前，已经有人砸坏封了门窗的房屋把自己配的电气线路中的铜线剥离出来。”

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Mr. Leonard gave the writers an early manuscript and told them they could "hang it up and strip it for parts, " says executive producer Graham Yost.

WSJ: Elmore Leonard on 'Justified' and His New Book, 'Raylan'

Flowers says he always felt an excitement about growing up near the Strip.

NPR: Brandon Flowers: An Ode To Las Vegas In 'Flamingo'

These two TED talks by rebels with a cause will have you digging up your parking strip and organizing your community in no time.

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