While you are in the prime of life, why not devote yourselves to a special field of study?

为什么不把握人生中最美好的时间，努力做一种专门学问呢？

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In Swedish football, goalposts rest on top of the playing field, making them prime targets for cheaters.

在瑞典足坛，门柱是立在地面上的，这也使门柱成为作弊者的主要目标。

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Most or all of the gas was to be sold to Israel.But Ariel Sharon, when he was Israel's prime minister, vetoed the project, ostensibly on security grounds, and the field lies unexploited.

大部分的海上天然气将被卖到以色列，可是当时以色列的首相阿里埃勒·沙龙，否决了这个项目，以安全为借口没有开发这一资源。

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The deliberations may be endless, but we've whittled down the playing field to some prime contenders.

ENGADGET: 's holiday gift guide 2012: ultraportables

In each victory, the Jets benefited immensely from a short kickoff that gave them prime field position and led to important scores.

WSJ: The Jets' Kick-Return Game: a Gift and a Curse

She felt even more dismayed and said not a thing when, with the crops in, John arranged to sell away his dozen prime field hands.

NPR: E.L. Doctorow on Sherman and 'The March'