The other thing is in versus out migration.

另外一件要考虑的就是迁移。

So, what we did is we used satellite tags to track their migrations out of that Auckland Islands wintering ground and follow them around the Southern Ocean.

“我们使用了卫星追踪装置来跟踪它们从奥克兰群岛的越冬地迁移出来的过程，并跟踪它们到了南冰洋周围。