adj.
										 be getting younger
										- (表示做某事的人好像越来越年轻)
 used to say that people seem to be doing sth at a younger age than they used to, or that they seem younger because you are now older- The band's fans are getting younger.
 这支乐队的歌迷越来越年轻了。
- Why do police officers seem to be getting younger?
 为什么警察好像越来越年轻了?
 
 not be getting any younger
										- 老了;岁月不饶人
 used when you are commenting that time is passing and that you, or sb else, is growing older
 
 young at heart
										- 人老心不老
 thinking and behaving like a young person even when you are old
 
 (have) an old head on young shoulders
										- 年轻老练;少年老成
 used to describe a young person who acts in a more sensible way than you would expect for a person of their age
 
 you're only young once
										- 行乐当及年少时;青春只有一次
 young people should enjoy themselves as much as possible, because they will have to work and worry later in their lives