migration period

例句：

1. 1. The company's annual migration period is from July toAugust.
   该公司的年度迁移期从七月到八月。
2. 2. During the migration period, thepopulation of the city increased significantly.
   在迁移期间，该市的人口显著增加。
3. 3. Themigration period is a critical time for businessesto plan their operations.
   迁移期对企业来说是一个关键的规划时间。