The system produces needs faster than it can satisfy them.

城市林业证明自然与城市可以共同繁荣。

量子计算的潜在应用非常广泛，从密码学到材料科学再到人工智能。

I am the happiest creature in the world. Perhaps other people have said so before, but not one with such justice. I am happier even than Jane; she only smiles, I laugh.

The more you know, the less you need.

黄金和白银，像其他商品一样，具有内在价值，这不是任意的，而是取决于它们的稀缺性、获取它们所耗费的劳动量以及在矿山中使用的资本价值。