在过去的短短三十年里，童年期由于青少年的过早发育被缩短了一年半。
In just three decades' childhood 'has been cut back by a year and a half as youngsters develop earlier.
例如，某些患有发育障碍的人们在其40和50多岁时就显示出过早衰老的体征。
For example some people with developmental disabilities show signs of premature ageing in their 40s and 50s.
回想一下你自己十几岁时的情形，想想你是如何跟青春痘叫劲的，你是否曾经因为发育过早或过晚而感到难为情。
Think back on your own teen years. Remember your struggles with acne or your embarrassment at developing early - or late.
应用推荐