求翻译：本研究通过问卷调本与相关测定手段阐述了在不同的阶段游泳运动员与长跑运动员的体脂含量及脂肪存有一定的差异。但由于年龄、饮食、体力活动的不同，也由于训练干预在年龄上的不同步以及运动选材和遗传方面的因素的干扰，我们并不能确定导致这种差异的明确的原因。但至少可以确定，游泳运动员与长跑员身体成分以及体脂分布的不同与训练因素（能量消耗）、运动环境和饮食习惯密切相关。但要明确的探讨游泳与跑步本身对体脂的影响，需要时行实验性研究来除训练的强度及量、饮食、能量代谢及先天因素的干扰。是什么意思？

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The present study, a questionnaire and the associated with measuring instruments in different stages of swimmers and runners of the body fat content and fat there is a certain difference. However, due to age, diet, physical activity, and also because of the different training intervention on the age

Study on the determination of this regulation and the relevant instruments elaborated by the questionnaire in different stages of swimmer and runner body fat content and fat there is a certain difference. However, because of differences in age, diet, physical activity, as well as training in the age