Every ton of ore we extract carries with it a responsibility to the future.

那话怎么说的来着，"好酒不贪杯，益寿延年"。

快乐不是现成的东西。它来自你自己的行动。

世界既广阔又狭小。

如果我们为之奋斗，煤炭的未来是光明的。

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.