Some 30,000 Chinese children lost their hearing every year because of heredity, infection, adverse drug reaction and other reasons, according to official figures.
Some 30,000 Chinese children lost their hearing every year because of heredity, infection, adverse drug reaction and other reasons, according to official figures.
三万中国儿童每年因失去听力遗传、感染、药物不良反应等原因,据官方公布的数字.