1·They claimed they were political refugees and not economic migrants.
他们宣称自己是政治难民，不是经济移民。
—— 《牛津词典》
2·The government divides asylum seekers into economic migrants and genuine refugees.
政府将寻求政治庇护的人划分为经济移民和真正的难民。
—— 《柯林斯英汉双解大词典》
3·Somewhat later, the migrants returned, bringing new species with them.
不久之后，移民回来了，还带来了新的物种。
4·New species of fauna populated the Mediterranean when the old migrants returned.
当“旧移民”返回地中海时，地中海又出现了新的动物物种。
5·Unlike the British, continental migrants have to struggle with an unfamiliar language and new customs.
与英国人不同的是，欧洲大陆的移民必须努力适应陌生的语言和新的习俗。