今天我们必须负责任地开采煤炭,这样我们的孩子才能继承能源安全和健康的环境。
生物学是对那些看起来像是为了某种目的而被设计的复杂事物的研究。
The great question which, in all ages, has disturbed mankind, and brought on them the greatest part of their mischiefs, has been, not whether there be power in the world, nor whence it came, but who should have it.
The only way to achieve the impossible is to believe it is possible.