translation.en: Smiling can help reduce the level of stress-enhancing hormones like cortisol, adrenaline and dopamine, increase the level of mood-enhancing hormones like endorphins, and reduce overall blood pressure.
translation.zh: 微笑能够帮助降低 皮质醇，肾上腺素和多巴胺等 增压激素的水平 提高内啡肽等 改善心情的激素水平 并降低整体血压