Scientists at the Los Alamos National Laboratory have succeeded for the first time in mining heat from the Earth's interior (and producing energy on a commercial scale, enough for efficient generation of electricity and heating factories and homes.) (D) to produce energy on a commercial scale, enough for generating electricity efficiently and for heating 我想问的是：enough for Ving 这是OK的吗？ 练习时因为认定enough to 原形V 是一个规则而没选（D） 希望达人可以指教一下吧！ 快考试了！ --

※ 发信站: 批踢踢实业坊(ptt.cc) ◆ From: 123.195.208.34