题目内容

16．这是人类首次认真思考自己的活动对环境造成的影响．（It's the first time； effect）It is the first time （that） humans/human beings have thought seriously about the effect of their activities on the environment．

分析 这是人类首次认真思考自己的活动对环境造成的影响．

解答 答案：It is the first time （that） humans/human beings have thought seriously about the effect of their activities on the environment．
解析：It is the first time （that）这个结构中，that从句要用现在完成时（如果是it was the first time that，则that从句要用过去完成时）；另外本题还考查the effect on"对…造成的影响"这一固定短语．

点评 本题考查句子翻译，做此类题目时一定要根据中文及英文题干确定需要翻译的成分，再找出与之对应的英文并考虑各成分是否有形式的改变．

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