作为美国第一位环保主义者，约翰·缪尔一生都敢于冒险。
As America's first environmentalist, John Muir lived his life forever daring to undertake new adventures.
缪尔一生都在观察中学习，这使他在生命的最后几年致力于保护自然环境。
Muir's learning in observation throughout his life led him to devote his last years to preserving the natural environment.
另一个人对缪尔一生的描述，证明了成为终身学习者并利用这种学习传递信息和带来改变的意义所在。
The other's portrayal of Muir's life is a testimony to what it means to be lifelong learners and to use that learning to inform and bring about change.
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