Crandall tells the real-life story of a 'widow-maker' heart attack that did not have to happen.
戴维说“克尔多夫向我们陈述了危及人类生命，但不一定会发生的心脏病的真实故事。
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Post-it maker 3m hired Sahni while he was still pursuing his PhD, studying the webs of black widow and common garden spiders, including the spider pictured above.