Their ages varied from 1 month to 13.8 years with a peak age of 1 year and 87.4% of children less than 5 years of age.是什么意思_Their ages varied from 1 month to 13.8 years with a peak age of 1 year and 87.4% of children less than 5 years of age.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句