A selenious acid type solution of better performance was obtained by the test of polarization curve, the test of corrosion resistance and the test of duration life.

研究改进了现行的钢铁件常温黑化工艺，通过极化曲线测试、耐蚀性测试、寿命测试得到了性能良好的常温亚硒酸体系黑化液。

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For example, the average duration of human life has hardly changed in thousands of years.

例如，人类的平均寿命在几千年里几乎没有改变。

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What matters is not the duration of your life, but the donation of it.

重要的不是你的寿命有多长，而是你的生命付出了多少。

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These composites were initially banned in 2009, but they can be used now as long as BBCOR standards are maintained for the duration of a bat's life.

WSJ: College Baseball: The Ping Is Losing Pop

And the rise in the book value of their equity holdings adds to the proportion of risky assets held by life companies, adding also to the mismatch of duration.

ECONOMIST: Japanese insurance

Atop this vehicle would sit a capsule, called Orion, equipped with the life support technologies able to sustain humans on long-duration missions.

BBC: European tech could propel Nasa's Orion capsule