South Korea Leads List of Life Expectancy Gains

音频下载[点击右键另存为]

body-mass index – n. a weight-to-height ratio, calculated by dividing one's weight in kilograms by the square of one's height in meters and used as an indicator of obesity and underweight.

homicide – n. the act of killing another person

industrialize – v. to develop industries in a country or region on a wide scale.
lifespan – n. the length of time for which a person or animal lives

life expectancy – n. the average period that a person may expect to live.

mortality – n. the death of a person, animal, etc.

nutrition – n. the process of eating the right kind of food so you can grow properly and be healthy

obesity – n. the problem of being overweight in a way that is unhealthy