可持续性是农业的未来,忽视它的人将被淘汰。
未来不是现在提供的替代路径中选择的结果,而是一个被创造的地方——首先在思想和意志中创造,然后在活动中创造。
The fundamental point in fabricating a chain reacting machine is of course to see to it that each fission produces a certain number of neutrons and some of these neutrons will again produce fission.