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2．They agree to the plan inprinciple（原則上）．

分析 他們原則上同意這個計劃．

解答 答案：principle．考查固定短語．固定短語in principle表示"原則上"．

點評 考查翻譯填空．in principle和on principle的區(qū)別：
1）in principle：原則上，基本上，指一般大眾的觀念上，一般意義上，受眾范圍廣．
例：1．with regard to fundamentals although not concerning details；
"in principle，we agree"雖然這些不是關于細節(jié)，但基本上我們是同意的．
2）on principle：依據(jù)自己的原則[所確定的信念]，照例，使用范圍夠狹窄．
例：1．He drank hot milk every night on principle．
他照例每晚必飲熱牛奶．

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