你的快乐无法持续是因为我。

Small steps in sustainability today can lead to monumental changes tomorrow.

The most valuable crop we can grow is trust between farmers and consumers.

The present state of the system of nature is evidently a resultant of what it was in the preceding moment, and if we conceive of an intelligence which at a given instant comprehends all the relations of the entities of this universe, it could state the respective positions, motions, and general effects of all these entities at any time in the past or future.