It also boosts immunity.

昆布丝还能增强免疫力。

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Vitamin C -- Vitamin C boosts immunity, which helps maintain overall health.

维生素C--维生素C能提高免疫性，帮助维护整体健康。

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And smiling has been clinically shown to lower blood pressure, boost immunity, and even release natural painkillers (endorphins), each of which lowers stress, boosts happiness, and improves health.

微笑在临床上的表现能降低血压，提高免疫力，甚至还能释放出天然止痛药(内啡肽)，这每样都能减轻压力、增加快乐和促进健康。

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