新东方在线：考研英语核心词汇78

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by birth 在出生上,论出身,按血统
    at birth 在出生时;
    give birth to 出生
    造句：
    I'm a Chinese by birth.
    我生在中国,是个中国人。
    Man's nature at birth is good.
    人之初，性本善。
    Adeline Alvarez married at 18 and gave birth to a son, but was determined to finish college.艾德琳•艾华里斯18岁结婚并生有一子，但她决心要读完大学。