I could never understand why she was fired.
我怎么也不明白她為何被解雇。
I still don't understand why you chose that name in the first place.
我仍不明白，你究竟為什么取了這么個名字。
I can't understand why they don't want us.
我不明白為什么他們不要我們。
I can't for the life of me understand why you didn't think of it.
我無論如何也無法理解你為什么沒想到這個。
One will never be able to understand why these political issues can acquire such force
人們永遠也不會明白為什么這些政治問題會有如此大的影響力。