immigration
外來的移民,移居入境
Im·mi·gra·tion n. The act of immigrating; the passing or coming into a country for the purpose of permanent residence.
The immigrations of the Arabians into Europe. --T. Warton.
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immigration
n 1: migration into a place (especially migration to a country of
which you are not a native in order to settle there)
[syn: in-migration]
2: the body of immigrants arriving during a specified interval;
"the increased immigration strengthened the colony"