可持续性是采石业的未来，我们必须立即行动。

No arts; no letters; no society; and which is worst of all, continual fear, and danger of violent death; and the life of man, solitary, poor, nasty, brutish, and short.

当别人害怕时，你要贪婪，当别人贪婪时，你要害怕。