"it's anybody's guess" in Chinese (Simplified)
谁也不知道难以预料
Definition
用来表示没有人知道问题的答案或将要发生什么，结果完全无法预测。
Usage Notes (Chinese (Simplified))
这是非正式表达，常用于形势极其不确定或难以预测时。常见于口语交流，也可用“谁也不知道”“难说”等替换。正式书面语中不常用。
Examples
When the train will arrive is anybody's guess.
火车何时到达，**谁也不知道**。
It's anybody's guess how much the new phone will cost.
新手机要卖多少钱，**谁也不知道**。
After the storm, what happens next is anybody's guess.
暴风雨过后会发生什么，**难以预料**。
Honestly, where she got all that money is anybody's guess.
说实话，她的钱哪儿来的，**谁也不知道**。
These days, whether the team will win or lose is anybody's guess.
现在这支队伍赢还是输，**难以预料**。
Why he quit his job is anybody's guess.
他为什么辞职，**谁也不知道**。