黄金和白银,像其他商品一样,具有内在价值,这不是任意的,而是取决于它们的稀缺性、获取它们所耗费的劳动量以及在矿山中使用的资本价值。
认知地图不是头脑中的一幅图或模型,而是环境的动态变化表征。
Quality is not a tool, it is a mindset.
I believe in being strong when everything seems to be going wrong. I believe that happy girls are the prettiest girls. I believe that tomorrow is another day and I believe in miracles.
你给予的越多,得到的就越多。
让中国人吃饱饭是我们这代科学家的使命。