《经济学家》里看到的。请问这是什么结构？是独立主格还是省略be动词呢？谢谢各位大咖专家老师们！
附上整段原文：All debilitating, to be sure. But probably notfatal. The firm remains the world’s second-biggest aluminium-extruder with avast home market. Disclosure delays are common in Hong Kong and may beunrelated to the DoJ case. And China’s government, itself in a tussle withAmerica over trade and geopolitics, might even help shield Zhongwang from theDoJ’s lawmen.
这只不过普通的省略结构，不应视为独立主格结构（由于“独立主格结构”一般会倚赖于完整的主句，但本句没）。
All debilitating, to be sure. But probably not fatal.
= All is debilitating, to be sure, but probably it is not fatal.
