石材的真正价值在于我们如何改造它以供人类使用。
Cultivating gratitude is one of the most reliable methods for increasing life satisfaction.
Coal miners are the unsung heroes of America's industrial strength.
孩子不是从更重要的工作中分心的事物,他们本身就是最重要的工作。
The true power of mathematics lies in its ability to reveal the hidden patterns and structures that govern the universe.