Warning: file_put_contents(/www/wwwroot/ppbbu/4cd.cn/cache/8de019f8ba127e4520d879a06ed27d58.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/4cd.cn/index.php on line 55 down syndrome英英字典_down syndrome剑桥英语解释_down syndrome柯林斯英文解释_沉淀汉英词典
1. N-UNCOUNTDown syndrome is a disorder that some people are born with. People who have Down syndrome have a flat forehead and sloping eyes and lower than average intelligence. 唐氏综合征