牛奶纤维是二十一世纪健康、舒适、环保新型纤维。
Milk fiber is healthy, comfortable, environmental protection in twenty-first Century of new fiber.
心理健康是现代健康观的重要组成部分，也是二十一世纪健康教育的主题。
Psychological health is an important part of the modern health viewpoint and it's the topic of the health education.
这个的背景是从20世纪60年代到21世纪初，美国的平均健康指数上升了。
The background to this is that from the 1960s into the early 2000s, measures of average wellbeing went up in the US.
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