Warning: file_put_contents(): Only 0 of 5121 bytes written, possibly out of free disk space in /www/wwwroot/ppbbu/4cd.cn/index.php on line 55 become younger in average age是什么意思，become younger in average age的翻译，become younger in average age音标、读音、用法和例句_沉淀汉英词典
Except morbidity number rapid increase, morbidity crowd displays the become younger in average age trend also gradually. 除了發病人數急劇增加外，發病人群也日益呈現出年輕化趨勢。 blog.sina.com.cn