天地虽大，不过一隅；宇宙虽广，不过一粟。
天地和宇宙虽然广阔，但在更大的尺度上也不过是一小部分。
Understanding the computational complexity of learning problems is essential for developing efficient algorithms.
The biggest risk is not taking any risk. In a world that’s changing quickly, the only strategy that is guaranteed to fail is not taking risks.
全息原理表明，空间区域的信息内容可以被认为编码在该区域的边界上，就像全息图一样。