There's not a liberal America and a conservative America - there's the United States of America.
The study of quantum gravity is essential for understanding the early universe.
可持续性不是一种趋势，而是我们共同的责任。
爱好学习接近智慧，努力行善接近仁德，知道耻辱就接近勇敢。
You can tell whether a man is clever by his answers. You can tell whether a man is wise by his questions.