Whenever we smile, nerves and muscles may transmit messages that turn on happiness centers in the brain, Laird speculates.
每当我们微笑时，神经和肌肉就会传递信息使大脑的快乐中心兴奋，莱尔德猜测说。
Whenever we smile, nerves and muscles may transmit messages that turn on happiness centers in the brain, Laird speculates. "The bottom line is that a smile doesn't cost anything and may do you good."
拉瑞德推测，无论何时我们微笑，神经和肌肉会传送打开大脑中快乐中心的信息，“结果是一个微笑不花费任何成本而可以使你感觉良好。”
As her frequent customers, we could always encounter her amiable smile whenever we turned to her. Her smile was so soft and deep, but also reflected a tough character.
我们是她的老主顾，每次看到她，她总是很和蔼地对我们点头微笑，那微笑，很深遂、很柔和，却又显得很坚强。
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