naturalisation
[ˌnætʃərələ'zeɪʃən]
n.
（外国人的）归化(naturalization);
（动植物的）移植;
（外国的习惯、语言等的）移入;
同化;
例句:
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He had " derivative citizenship " from his father's naturalisation around 1990.
由于他父亲于1990年前后入了籍,他也承袭了公民权.
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The same principle is seen in the naturalisation of plants through man's agency in foreign lands.
经人类的作用而使植物在异地归化的情况,亦属于同样原理.
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Sealand's Certificate of Naturalisation, not available now.
西兰公国的公民国籍归化证明, 不过现在并不开放申请.