The future of coal depends on our ability to innovate and reduce its environmental impact.
心灵是在充满挑战的世界中可能性的器官。
Life is about taking chances and trying new things.
反射是神经活动最简单和最常见的形式。
一个观念的价值在于它的实际后果。
法律权威的概念对于法律系统的运作至关重要。