短语词组短语Stop emigration 中止出境移民Emigration rate 迁出率thymocyte emigration 胸腺细胞迁移emigration region 迁出区Emigration Canyon 移民峡谷;犹他州的移民峡谷emigration control 出境检查inner emigration 内在移民Start emigration 开始出境移民 返回 emigration