受访者通过调查问卷回答了有关多长时间会进行一次日光浴、使用日光浴床的情况以及是否到其他地区游泳及日光浴等问题。
Subjects reported on questionnaires how often they sunbathed, their use of tanning beds, and if they traveled to other regions to swim and sunbathe.
受访者通过调查问卷回答了有关多长时间会进行一次日光浴、使用日光浴床的情况以及是否到其他地区游泳及日光浴等问题。
Subjects reported on questionnaires how often they sunbathed, their use of tanning beds, and if they traveled to other regions to swim and sunbathe.
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