例【真题回放2010-text2】Curbs on business-method claims would be a dramatic about-face，because it was the federal circuit itself that introduced such patents with is 1998 decision in the so-called state Street Bank case，approving a patent on a way of pooling mutual-fund assets.
主干：Curbs on business-method claims would be a dramatic about-face
原因状语从句：because…case
强调句：it was the federal circuit itself that introduced such patents with is 1998 decision in the so-called state Street Bank case
Ving短语作结果状语：approving a patent on a way of pooling mutual-fund assets
