关于地精和精灵的观念与黑暗和光明没有任何关系。
The ideas of goblins and sprights have really no more to do with darkness than light.
We must balance short-term profits with long-term sustainability.
"The future is not a place we are going, but a place we are creating."
广义相对论已经通过了我们所有的测试，甚至在超大质量黑洞附近也是如此。