separated at birth

separated at birth at birth是什么意思? separated at a birth和at birth的区别给 为什么不用at birth?He is noble by birth. birth man's nature at birth is good Name(s) at birth (previous surname(s)) spouse family name at birth是什么意思 A television news story has led to the reunion twin sisters who were separated at birth 28 years ago.Nina Rosario and Alicia Torres were born in 1980 in Mendoza,Argentina（阿根廷）.Their mother,an unmarried 21-year-old,was unable to take care of I recognized her at first sight,though____from her for 20 years.答案是separated还是had been separated?为什么? 英语翻译she gave birth to three children----separated by only four years,separated一词是分开,间隔的意思,为什么翻成在四年内,是怎么理解的呢? The baby panda was very w______________ at birth. surname是姓,surname at birth(earlier family name)是什么? he was b--------at birth,he could not see anything she weighs about 2 kilograms at birth改错 A baby panda ____（重）100 grams at birth. The baby girl____(weigh)3.4 kilograms at birth.