The market will not bottom out ,by which point there will be a 40 to 50 per cent dropby which 指代什么 为什么用by

问题描述:

The market will not bottom out ,by which point there will be a 40 to 50 per cent drop
by which 指代什么 为什么用by

by which point =by the point that...
意思是说犹由于这一点