每个个体改善自身状况的自然努力，当在自由和安全的情况下得以发挥时，是如此强大，以至于它不仅能够独自，不受任何协助，推动社会走向富裕和繁荣，而且能够克服往往由愚蠢的人类法律造成的百般妨碍。

To understand chemistry at its most fundamental level, we must look at the dance of electrons in molecules.

没有了目的，生活便郁闷无光。

Quality begins at the farm, and excellence is built through every step of the supply chain.