We do not know what ingredients of tea were responsible for these effects on stress recovery and relaxation.

我们确实不知道是茶中的何种成分起到了抗压力促进放松的作用。

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This now classic study on stress recovery through contact with nature has recently inspired a host of new research.

此研究目前已经成为与自然接触——即应激恢复的经典案例，并于近期内激发了大量的相关研究。

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We do not know what ingredients of tea were responsible for these effects on stress recovery and relaxation. Tea is chemically very complex, with many different ingredients.

我们确实不知道是茶中的何种成分起到了抗压力促进放松的作用。茶的化学成分非常复杂，含有许多不同的成分。

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All administration officials stress the key to recovery is the implementation of the president's full economic agenda.

VOA: standard.2009.03.15

"We saw a steeper decline in heart rate and a faster physiological stress recovery when they were smiling, " even though the participants weren't aware they were making facial expressions, says Sarah Pressman, co-author of the study and an assistant psychology professor at University of California, Irvine.

WSJ: Stress-Busting Smiles

That service orientation is critical, because wireless carriers stress revenue generation over cost recovery.

FORBES: Surviving Iridium

So, while chronic stress is always bad for you, a short period of mild stress followed by a period of recovery can be good.

ECONOMIST: How to live longer��maybe