台湾籍旅美老师今天交给我们的句子是：

A very common weight lost trick that people may not know is actually when you laugh you're burning fat and working your abdominal muscles. So just start laughing all the time.
一个最常见却不为人所知的减肥技巧就是当你笑的时候，你就会燃烧脂肪和训练你的腹肌，所以无时无刻都来笑吧！