这些激素长期保持高水平与心脏病有关。

Chronically high levels of these hormones have been linked to heart disease.

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要想在保持高水平表现的同时把比赛进行到底，运动员需要非常健康的身体。

To see a game through to the final whistle while maintaining high performance, a player needs to be as fit as a fiddle.

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在广告收入极低的情况下，如何保持高水平的新闻报道水平。

How can you keep the level of journalism high when the income from ads is so low? (Watch an interview with Arianna Huffington.)

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