从高山返回后，她需要几天时间重新适应平原的气候。

After returning from the mountains, she needed a few days to ___reacclimate to the climate of the plains.

刚从热带度假回来，我需要几天时间重新适应北方的寒冷天气。

After returning from a tropical vacation, I need a few days to ___reacclimate to the cold northern weather.