■沒錯！He fell off a tall tree, his leg broken.一句話中的 his leg broken 是獨立主格結構，屬于帶過去分詞的獨立主格結構。正因為過去分詞 broken 的邏輯主語與句子主語不一致，所以其前要加上自己的邏輯主語(his leg)，它其實就是帶有邏輯主語的過去分詞，也就是我們通常說的獨立主格結構。　　

■The report, published by Mandian, an American cyber-security firm, found that a group of hackers linked to the Chinese army is probably one of the world's "most prolific cyber-espionage groups". 　　

這句中的 published by Mandian 應該是過去分詞作定語（非限制性定語），可以轉換為非限制性定語從句，即：　　

The report, which was published by Mandian, an American cyber-security firm, found that a group of hackers linked to the Chinese army is probably one of the world's "most prolific cyber-espionage groups".

不好意思啊，我對這個不是很懂，如果ie瀏覽器可以，那就用ie瀏覽器算了吧！