The dead are not absent. They are just invisible.
The labor which it would require to make a single one of these guns by hand would exhaust the patience and perseverance of any ordinary workman.
We must invest in our people as much as we invest in our technology.
未来是属于新能源的时代。
文化生态学的概念本质上是一种方法论工具,用于理解人类社会如何适应其环境。