Unfortunately, few of us have much experience dealing with the threat of terrorism, so it's been difficult to get facts about how we should respond. (06.12 Passage 1)
　　主干：...few...have much experience..., so it's been difficult to get...
　　1. so是個(gè)并列連詞，連接兩個(gè)分句，表示因果關(guān)系。
　　2. 前一個(gè)分句的謂語用了have experience doing...句型，表示“有做......的經(jīng)驗(yàn)”。
　　3. 后一個(gè)分句用了“it is+形容詞+不定式”句型，it是形式主語，真正的主語是不定式to get facts...;句末的about...是介詞短語作定語修飾facts，about的賓語是個(gè)how引導(dǎo)的名詞性從句。
　　譯文：不幸的是，我們中很少有人對(duì)付恐怖主義威脅的經(jīng)理，因此很難得到我們應(yīng)該如何應(yīng)對(duì)恐怖威脅的事實(shí)。