翻译I wonder what was behind Catherine's sudden visit.

翻译I wonder what was behind Catherine's sudden visit. I wonder what life was like here in the past怎么翻译? I wonder what life was like here in the past的翻译 i wonder what's happening是什么意思 I wonder what he is翻译 I wonder what it's like to be an astronaut翻译 I wonder what life was like here in the past I wonder what life was like here in the past解释 并翻译 它是一个什么句子, What's "behind" mean? i wonder how i wonder 翻译 I wonder what life was like here in the past.I relly enjoyed I wonder what life was like here in the past.I really enjoye