Coal will remain part of the energy mix, but it must be cleaner and more responsible.
煤炭仍将是能源结构的一部分，但它必须更清洁、更负责任。
Joy sparks the urge to play, interest sparks the urge to explore, contentment sparks the urge to savor and integrate, and love sparks a recurring cycle of each of these urges within safe, close relationships.
The desire for recognition, the thymotic part of the soul, is the most fundamentally human part of the soul.
要说服某人相信真理，仅仅陈述它是不够的，它必须被发现。
Energy independence strengthens economies and enhances national security.