The two kinds of error

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In a statement, Lovell's family said: "We will miss his unshakeable optimism, his sense of humor, and the way he made each of us feel we could do the impossible. He was truly one of a kind."

"If we're producing technology our customers can't live with, that's our failing," he says, explaining that FireAngel alarms have been calibrated to avoid making them overly sensitive, in order to reduce false alarms.

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他已支付近新台幣20萬元仲介費用,債務壓力使他更勤奮工作,擔心造成任何疏失,連遭遇工傷也不敢抱怨。前年底,他在工廠工作時因司機操作高推車未注意,切斷一根手指,公司支付醫藥費並提供休養,勞保補償約新台幣10萬元。

Inside the Congolese mine vital to mobile phones, as rebels give BBC rare access

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