煤炭是我国的主体能源，在相当长时期内仍将是我国能源安全的基石。

Adaptability is the key to thriving in a changing world.

而是根据国家的具体情况，去掉那些无益于实用的东西，这就足够使国家的财利增加一倍了。 

Acting is not about being someone different. It's finding the similarity in what is apparently different, then finding myself in there.

数学家是将咖啡转化为定理的装置。