Fortunately, the correct cutting speed can be estimated with reasonable accuracy from tool-life graphs or from the Taylor tool life Relationship, provided that necessary data are obtainable.

幸好，正确的切割速度可以根据刀具寿命表或者刀具寿命泰勒方程估算出来，并有一定的合理精度，如果在必要的数据都具备的前提下。

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Instead of living for money, we should take it as a tool to help us lead a better life.

我们应该把金钱当作一种工具，让我们过上更好的生活，而不是为了金钱而活。

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Glass concludes that, as a tool to achieve work-life balance, telecommuting is, in fact, a failure.

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Mr. Williams said he called the mayor to apologize but stands by his position that the NYPD is misusing the tactic and that the administration is using "spin and selective statistics" to sell stop and frisk as a life-saving tool.

WSJ: Mayor Celebrates His Achievements

But Twitter is, in the end, a networking tool and a news digest, not a life-style ideal by which people set their professional, financial, and romantic compasses.

NEWYORKER: Semi-Charmed Life