VOA慢速英语:For Black Men in US, How a Haircut Could Mean a Longer Life

例句：In Africa, there are a lot of children suffering from severe malnutrition.
      在非洲有大批严重营养不良的孩子。

2.obese adj.极为肥胖的;臃肿的；虚胖的；病态肥胖的

例句：Being obese and lazy is dangerous to health.
      又胖又懒危害健康。
 
3.gratitude n.感激, 感谢

例句：Her eyes were immediately filled with gratitude.
      她的眼里立刻充满了感激之情。

4.sedentary adj.坐着的(工作、活动等）需要久坐的

例句：People in sedentary jobs need to take exercise.
      工作上要久坐的人需要做运动。

5.slum n.贫民窟, 贫民区, 棚屋区

例句：As a social worker, she does a lot of work in slums.
      作为一个社会工作者, 她在贫民区做了大量的工作。