Even when you've got nothing to smile about. Forcing a smile can trick your body into changing your mood.

即使当你没有可以笑的事的时候，强迫自己笑可以欺骗自己的身体，从而改变自己的情绪。

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It is scientifically proven that forcing a smile actually reduces your cortisol levels and helps reducing stress.

科学表明挤出笑容可以降低你的皮质水平，帮助你减压。

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It even works when you don't feel much like smiling. Just try forcing a smile for 30 seconds if you are feeling a bit negative and see what happens.

微笑能够使你和身边人进入到一种更加积极的情绪当中，甚至在你并不很想微笑时也会奏效。如果你感到沮丧，那么就试着保持三十秒钟的微笑吧，看看这样会有什么效果。

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This is a complete 180-degree change from the situation at the beginning of 2008, when record-high oil prices put a big smile on the faces of oil producers while forcing oil consumers to pinch pennies.

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