参考答案

正确答案：In an attempt to reduce the death rate from lung cancer
In an attempt to reduce the death rate from lung cancer 解析：分析句子结构可知，所译部分为目的状语，故可用介词短语的形式表达。“努力……”用in an attempt to表达：“降低”用reduce表达；“肺癌的死亡率”用the death rate from lung cancer表达。