since you accept/understand my point, then why would you still want to do that.
Since = 竟然, you= 你, understand = 认同, my = 我, 观点= point, then why would you= 为什么你还, want= 想, 做= to do, 那件事= that。
抱歉,可能后面不太好。。
Why would you still want to do that if you agree with me ?
Since you approve my opinion ,why do you still want to do that thing? 希望可以帮到您哦!
Now that you agree to my point of view, why do you still want to do it?
If you agree with my point of view, why do you want to do that thing?
望采纳,谢谢!