但是，很多患有动脉粥样硬化的中老年运动员对自己的病情一无所知，虽然有些症状已经出现。

But many older athletes with atherosclerosis have no idea they suffer from the condition, which often causes few symptoms.

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他从来没有指导过这类运动员，对他们在力量训练上的缺乏经验一无所知。

He had never worked with comparable athletes before and had no conception of their inexperience with strength training.

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