The prence of tobacco in the world of 200 years, until the 20th century, mankind began to recognize that tobacco harm to humans.
烟草在全球盛行了两百多年，直到20世纪，人类才开始认识到烟草对人类的危害。
People are less active now than they were 30 years ago, and the prence of fast food has given people less healthy, more energy-dense options.
因为人们比30年前更加懒散，快餐的流行也给了人们健康程度降低但热量增加的选择。
People are less active now than they were 30 years ago, and the prence of fast food has given people less healthy, more energy-dense options.
因为人们比30年前更加懒散，快餐的流行也给了人们健康程度降低但热量增加的选择。
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