immigration
n.移居；***immigration英英释义Nounmigration into a place (especially migration to a country of which you are not a native in order to settle there)the body of immigrants arriving during a specified interval...
n.移居；***immigration英英释义Nounmigration into a place (especially migration to a country of which you are not a native in order to settle there)the body of immigrants arriving during a specified interval...