转变期 meaning in English

climacteric
transition period

Path ; transition from compression to extension
轨迹挤压伸展转变期
They want to know what is this period of change like for their peers in europe and the us
他们想知道，对于欧美的同龄人来说，这个转变期是个什么样子。
They also found signs of a second shift , from surf and turf back to land beasts alone , corresponding to the time when human settlers began hunting seal and whale
同时他们还发现到，秃鹰的食物来源有过另一次转变的迹象：从海陆大餐回复到只以陆生动物为食；这个转变期，与定居的人类开始捕捉海豹及鲸鱼的时期相互对应。