请问：关于此句英语的句型句子如下：If we glimpse the unutterable ,it is unwise to try to utter it ,nor should we seek to invest with significance that which we cannot grasp.参考译文：如果我们瞥见只可意会不可言传的事物,企图把它说出来,那是不明智的；对于我们不理解的事物,也不应该去赋于它某种意义.此句话中,to invest with significance that which we cannot grasp significance 是个名词,其后的that 和which 在句中作什么成份?哪一个是定语从句的先行词?significance 后面是定语从句，应该其后只要用一个先行词that 或which ,为什么that 和which 一起并列出现？他们在定语从句中分别作什么成份？
问题描述：
请问：关于此句英语的句型
句子如下：
If we glimpse the unutterable ,it is unwise to try to utter it ,nor should we seek to invest with significance that which we cannot grasp.参考译文：如果我们瞥见只可意会不可言传的事物,企图把它说出来,那是不明智的；对于我们不理解的事物,也不应该去赋于它某种意义.
此句话中,to invest with significance that which we cannot grasp significance 是个名词,其后的that 和which 在句中作什么成份?哪一个是定语从句的先行词?
significance 后面是定语从句，应该其后只要用一个先行词that 或which ,为什么that 和which 一起并列出现？他们在定语从句中分别作什么成份？
答
定语
If we glimpse the unutterable , it is unwise to try to utter it 指前面是一件事情
答
调整到正常的语序应该是invest significance with that which we cannot grasp.其中which是定语,that是代词,用来指代我们不理解的事物.
补充:invest significance with sth 是指赋予某事某种意义 that which we cannot grasp 中that是先行词,which引导的定语从句修饰that.