An impact capable of ejecting a fragment of the Martian surface into an Earth-intersecting orbit is even less probable than such an event on the Moon, in view of the Moon’s smaller size and closer proximity to Earth. 句首的an impact capable of... 是an impact （that is ）capable of 省略that is 的形式么 是后置定语什么的么？ 因为在复习语法 同时又看那本紫书 所以会纠结 希望能帮助下
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发表于 2012-11-25 16:58:38
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