二叠纪盆地将在未来几十年内保持美国石油生产的皇冠地位。
Never be afraid to explore new genres and styles—it keeps your artistry fresh and exciting.
法律体系的存在是一个事实问题,而不是道德问题。
Education is one of the most powerful tools we have for reducing inequality and promoting social mobility.
夜晚是一面伟大的镜子,但星星是它的倒影。