解释：河水成冰，不是一日的寒冷所致；积土成为高山，不是须臾的工夫就能完成。

而是根据国家的具体情况，去掉那些无益于实用的东西，这就足够使国家的财利增加一倍了。 

As we delve deeper into the quantum world, the importance of topology in understanding and manipulating quantum states becomes increasingly clear.

The most important thing is not the triumph, but the struggle.

The struggles I've been through, the pain I've endured, it all comes out in my music.