Harm is not a necessary ingredient in healing.

伤害并非治疗的必要组成部分。

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Yet seek to fight in a way which harms no one. Harm is not a necessary ingredient in healing.

然而，想办法以一种不会伤害任何人的方式战斗吧。伤害在治愈里并非一个必要的成分。

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Regardless of your spiritualbeliefs, purpose seems to be a necessary ingredient to livesuccessfully.

不管你的精神信仰如何，目的似乎是人生成功的必要组成部分。

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But it isn't yet efficient at jumping from person to person, a necessary ingredient for triggering a pandemic.

WSJ: Scientists Craft Bird Flu Type That Can Be Transmitted Through Air

Size has been seen as necessary--a necessary ingredient, a precondition to improving instruction.

NPR: Big Urban Schools Grapple with Multiple Problems

And that is why it is a necessary ingredient in the kind of justice we need on the Supreme Court.

CNN: Transcript of Obama-Sotomayor announcement