If you skillfully follow the multidisciplinary path, you will never wish to come back.It would be like cutting off your hands.
Innovation is the key to the future of coal industry, we must embrace new technologies and ideas.
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.
Think like a novice user when making products.
真相很少纯粹,也绝不简单。