Steel's fragility at low temperatures first became a major concern during the Second World War.

第二次世界大战期间，钢在低温下的易碎性首次成为人们关注的主要问题。

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As a major health risk hepatitis is second only to tobacco.

肝炎仅次于烟草是主要的健康隐患之一。

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Their second major change was to make the configuration step user scriptable.

他们的第二个主要变化是使用户可以对配置步骤编写脚本。

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But his second Broadway play, "All My Sons",was a major success It won several awards in nineteen forty-seven.

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and not decide our major until, like the end of second year.

而且不到大二结束不用确定专业。

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We divide that by the mass, so 0.12 kilograms, that's the mass of a regulation baseball for the major leagues, and the velocity of the baseball is 42 meters per second. So, we can cross out our units doing our unit analysis.

我们用质量来除它，质量为0，12千克，这是大多数联赛规定的棒球质量,棒球的速度为42米每秒,所以，我们可以消去单位,来做单位分析。

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It's a major second-term priority of President Barack Obama's and would usher in the most dramatic changes to the faltering U.S. immigration system in more than two decades.

WSJ: Rubio: Reports of immigration deal 'premature'

Should the Scotsman fail to climb four places in time, he will attempt to qualify for the year's second major via second regional qualifying at Walton Heath, Surrey, on 6 June.

BBC: SPORT | Golf | Poor finish hits Montgomerie bid

But, when a second major invasion followed Stanislas' second goal, the Millwall players left the pitch while stewards and police attempted to clear the fans.

BBC: West Ham 3-1 Millwall (aet)