1
immigration;emigration
合衆国は長い間「るつぼ」として知られているが、それは国民のほとんどが移民の子孫だからである。
The United States has long been known as a "melting pot" because most of its people are descended from immigrants.
2
immigrant;emigrant
ドイツの首相は移民問題に悩まされています。
The German Chancellor is plagued by immigration problems.