The idea of legal responsibility is central to the concept of law.

我不跟随人群，我引领他们。

今天投资于幼体营养研究，明天将养活数百万人。

The state, therefore, has not existed from all eternity. There have been societies that did without it, that had no notion of the state or state power. At a certain stage of economic development, which was necessarily bound up with the split of society into classes, the state became a necessity.

能源效率是我们减少排放过程中默默无闻的英雄。