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(gè)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(wú)論如何也無(wú)法理解你為什么沒(méi)想到這個(gè)。

　　One will never be able to understand why these political issues can acquire such force

　　人們永遠也不會(huì )明白為什么這些政治問(wèn)題會(huì )有如此大的影響力。