说gray hair，gray也作动词，指“变白”，graying population则是指“变老的人口，人口老龄化”。也可说aging population。...人口老龄化Japan’s population has shrunk for the fourth year running due to a low birthrate, according ……

Businessweek, 2005.1.31A graying populationONE of the greatest sociological shifts in history is on its way: the graying of the baby-boom generation. They're the people born after World War II ……

for the aging population, the fast-graying nation has long been searching for ways to improve... for the aging population, the fast-graying nation has long been searching for ways to improve the situation ……

Percentage of population online in 2011: ……

percentage of the world’s population who are: ……

. “Understanding the mechanism (机制) of the IRF4 graying association could also be relevant for developing ways to delay (延缓) hair graying,” said Ruiz-Linares. ……

About 85 per cent of the population cancurl(卷曲) their tongue into a tube. ……

China has a population of 737 million people in the countryside, which makes up 56 percent of the country's population.Source: National Bureau of Statistics ……

China has a population of 737 million people in the countryside, which makes up 56 percent of the country’s population.Source: National Bureau of Statistics ……

's not supposed to.Approaching his 50th birthday, Avram is a graying Baby Boomer, once the most sought after ……

, it might be best to look at a snapshot of his present: the short, graying man being pawed in his ……

Hitchcock.Mr Hitchcock is a tall, unassuming (不装腔作势的) man with graying hair. He has taught me English ……

China is facing an increasing financial burden because of the rapid growth of its elderlypopulation. ……

Percentage of adults by education level completedSource:Census Bureau, Current Population SurveyBy Rachel Huggins and Karl Gelles, USA TODAY ……

The world’s annual growth in population peaked at 88 million in 1989, and it is projected to fall steadily to about 41 million a year in 2050. At this time the population will reach 9.2 billion ……