Centers for Disease Control and Prevention says the average American man has a heart that’s 7.8 years “older” than his chronological age;
这标准如何制定?和什么比较?已经是“average American man”了,难道对比的是“average world man”?
Centers for Disease Control and Prevention says the average American man has a heart that’s 7.8 years “older” than his chronological age;
这标准如何制定?和什么比较?已经是“average American man”了,难道对比的是“average world man”?