The measure of our success is not just in tons extracted, but in communities uplifted.
解释:在人活动范围内的水就污浊,在野外无人地方的水就清洁。同为一样的水,都是从天边开源,有的混浊有的清洁,这是它们所处环境使它们这样的。
The world is a great book, and we are the words.
The purpose of government is to help those who cannot help themselves.