As a matter of fact, it is often very difficult for adoptees to find out about their birth parents because the birthrecords of most adoptees are usually sealed.
事实上,被收养者往往很难找到他们的亲生父母,因为大多数被收养者的出生记录通常是被封存的。
2
They compared the risk of getting breast cancer with birth size, relying on birthrecords, parent recall, and self reports.
他们根据出生卡片,父母回忆和自己报告比较患乳腺癌的风险和出生尺寸的关系。
3
She has documented the gap by comparing ages from death notices on a poodle email list she belongs to with birthrecords in a poodle database.