Unless action is taken,athletes will begin tinkering with their own DNA to boost their muscle power,heighten their oxygen?carrying capacity,and transform their endurance,they say.

• 他们说，如果不采取行动的话，运动员们就会开始着手改变自身的DNA以促进肌肉的力量，提高机体携氧能力，以及增强耐力。