age作为先行词的定语从句用什么关系词?

问题描述:

age作为先行词的定语从句用什么关系词?
我阅读遇到这样的句子:
When she got to an age where she gained enough skill to go outside her garden, she asked her mother if she could go for a bike ride outside the gate and down the lane.
其中的定语从句为什么不用when?
问题补充:age应该指时间,却不用when
why?

不是这样算的呵
语言是不是那种逻辑很强的学问
要先知其然,接触多了,就可以意会了,自己自然就觉得应该这麼用词
要注意培养语感,遮最重要