Criticizing Marxs thought of technology, North thinks that among momentumofsystem transition, population growth is the most ultimate one.
诺思批评马克思将技术而不是人口增长作为制度变迁的根本动力。
2
By far, the biggest type ofmomentum that comes into play when it comes to changing our energy system is economic momentum.
到目前为止，改变我们能源系统的最大动力类型是经济动力。
3
A fundamental law of physics holds that momentum is always conserved, meaning that unless some outside force enters a system, its total momentum must stay constant.