Although teens think they’ll live for ever, experts say that young people who are unfit may have serious health problems like a bad heart in later life.

A. 尽管十几岁的人总会觉得生命漫漫，来日方长，专家们却指出亚健康的年轻人以后可能会罹患心脏病等严重健康问题。
B. 尽管十几岁的人总会觉得会活很久，专家们说亚健康的年轻人以后可能会罹患心脏病等严重健康问题。