求翻译：据济南市疾控中心的调查结果发现，小学生肥胖率越来越高，连续两年均超过了20%，但肺活量却在下降，小学男、女学生肺活量平均下降了285毫升和308毫升。缺乏锻炼是导致学生们肺活量降低的主要原因是什么意思？

According to the CDC's findings in Jinan City, found that primary school obesity rates rising, more than two consecutive years of 20%, but vital capacity is declining, primary male and female students decreased vital capacity 285 ml and 308 ml. Lack of exercise leading to reduced lung capacity of th

According to the Jinan City Center for Disease Control, the survey found that elementary school students obesity rates are increasing, and two years in a row, more than 20% but lung capacity is on the decline, and elementary school boys and girls have declined on average lung capacity 285 ml and 308

According to the Jinan CSC's investigation result discovered that, the elementary student obese rate is more and more high, two yearly averages have surpassed 20% continuously, but the vital capacity is dropping actually, the elementary school male, the female student vital capacity dropped 285 mill

Jinan City, according to CDC survey found that obesity rates rising, two consecutive years of more than 20%, but vital capacity are falling, male and female students in primary schools average a 285 ml and 308 ml lower vital capacity. Main reason for the lack of exercise is to cause a reduction in l

Jinan City, according to CDC survey found that obesity rates rising, two consecutive years of more than 20%, but vital capacity are falling, male and female students in primary schools average a 285 ml and 308 ml lower vital capacity. Main reason for the lack of exercise is to cause a reduction in l