2．众所周知，学好一门外语需要时间和精力．As we all know，it takes time and effort to learn a foreign language well．

分析 As we all know，it takes time and effort to learn a foreign language well．

解答 答案：As we all know，it takes time and effort to learn a foreign language well．考查汉译英．根据中文提示众所周知，学好一门外语需要时间和精力．As we all know众所周知，是固定词组．it takes time to do sth花费时间做某事，是固定句型，句子为一般现在时．时间和精力time and effort．learn sth well学好…一门外语a foreign language．故答案为As we all know，it takes time and effort to learn a foreign language well．

点评 做这类题型，首先根据所给汉语明确句子所要考查的单词或短语的拼写，再结合相关语法知识对单词或短语做出形式上的变化．

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