原文
Travel can be very beneficial to young people in many ways and therefore gap years, where students travel abroad for a time before embarking upon a career, can be very useful for people as they grow up.
如上,有點不懂為什麼可以用where 引導出gap years 的non-defining clause,請問為什麼不是用when,而如果要用when去改寫句子該如何呢?
在網路上都查不到,麻煩各位大大了。