歌唱90%在于倾听。你也必须倾听寂静。

The beauty of mathematics is that it allows us to abstract away the complexities of the real world and focus on the underlying principles.

友情是两颗心灵寄宿在两个身体中。

The more the division of labor and the application of machinery extend, the more does competition extend among the workers, the more do their wages shrink together.