whys
n. 理由；令人费解的问题（why 的复数）
v. 问“为什么”的问题（why 的三单形式）
例句
I had no intention of going into the whys and the wherefores of the situation.
我无意深入调查这一情况的来龙去脉。
《牛津词典》
Even successful bosses need to be queried about the whys and wherefores of their actions.
即使是对成功的老板也要质询其决定的原因。
《柯林斯英汉双解大词典》
You are a man that has gone through it all, naturally you know the whys and wherefores of it.
你是过来人， 当然明白其中道理。
《新英汉大辞典》
