"whys" in Chinese (Simplified)
原因（为什么）
Definition
“why”的复数形式；指一件事情的所有理由或解释，常用于泛指或抽象讨论。
Usage Notes (Chinese (Simplified))
属于正式表达，常见于写作。短语 'the whys and wherefores' 指所有原因和理由。在口语中极少用。
Examples
The teacher explained the whys of the experiment.
老师解释了实验的所有**原因**。
She did not understand the whys of his decision.
她不明白他做这个决定的**原因**。
We discussed the whys and hows of the new plan.
我们讨论了新计划的**原因**和方式。
You can't just tell me what to do without explaining the whys behind it.
你不能只告诉我该怎么做，而不解释背后的**原因**。
She always wants to know the whys and wherefores of everything.
她总是想知道所有事情的**原因**和理由。
After all these years, I'm still searching for the whys of what happened.
这么多年过去了，我仍然在寻找当时事情的**原因**。