The ocean floor is not permanent, but is constantly being renewed.
海底并非永恒不变,而是在不断更新。
数学是理性的音乐。
The greatest stories are those that remain untold, hidden in the hearts of the people.
可持续性不是终点,而是日常实践。
断奶在幼儿生命中是个重要的转折点,我们不该让孩子继续吸吮而不咀嚼食物。