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當大雪降下，冷風吹起，獨行狼死，群聚狼生。

Sustainability is not an option; it's a necessity for the future of farming.

The best way to predict the future is to invent it.

質量不是一種行為，而是一種習慣。

解釋：凡要謀劃一件事，一定要預見到成功的把握，然后才可以去做。

Now this is not the end. It is not even the beginning of the end. But it is, perhaps, the end of the beginning.

The strength of a response tendency depends on the amount of reinforcement received.