Free radicals, linked to rapid aging, are highly reactive with other molecules, including vital DNA and proteins, the destruction of which can damage or kill cells.

与迅速衰老相关联的自由基很容易与包括维持生命所必需的DNA和蛋白质发生反应，而破坏这些DNA和蛋白质，就可能会损伤或杀死细胞。

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Scientists there examined DADS ability to kill cells in a process involving free radical production.

科学家们检查(DADS)能够在产生自由基的过程中杀灭细胞。

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The Cals had captured nearly a million Quarren throughout their struggles, yet did not want to free them, for they feared the Quarren would only fight until the Cals were forced to kill them.

卡尔人在反抗不断的情况下擒获了近一百万名夸润人，因为蒙卡尔人害怕夸润人会一直打下去，直到自己被迫杀死他们。

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His hesitation has been understandable: powerful lobbies on one side have insisted that fast-track deals must be Christmas-treed with onerous labour and environmental provisions, while free-market Republicans vowed to kill any fast-track so adorned.

ECONOMIST: The United States looks south

Earlier this year, Jandira Barone, owner of denim company Tristar, made headlines when she suggested a water-free denim cleanse throwing jeans into the freezer to kill germs.

FORBES: Levi's To Sell Water-wise Jeans