It is somewhat difficult to answer this question 什么意思? 那位大虾...
此话的意思是:回答这个问题有点难。句子结构分析:It 在此处作形式主语,替代动词不定式短语to answer this question ,真正的主语是to answer this question ,所以此句话也可改为To answer this question is somewhat difficult 。somewhat 是个副词,意为“一些,有点儿”修饰形容词difficult。