问题年龄
问题年龄
这个问题超越社会经济的所有界限,影响各个年龄段的人。
Declining mental function is often seen as a problem of old age, but certain aspects of brain function actually begin their decline in young adulthood, a new study suggests.心智功能衰退通常被视为老年问题,但一项新的研究表明,大脑功能的某些方面实际上在青年时代就开始衰退了。
During the last ice age our problem was too little carbon.在上一个冰河时代我们的问题是二氧化碳太少。