The highest form of ignorance is when you reject something you don't know anything about.
Architecture is an art when one consciously or unconsciously creates aesthetic emotion in the atmosphere and when this environment produces well-being.
We live in a beautiful world.
制造链式反应机器的基本点当然是确保每次裂变产生一定数量的中子,其中一些中子再次有效地产生裂变。