在19世纪初的时候，电、磁、光还被认为是三个彼此不同的学科，当时人类在这三个学科里面积累着大量的实验规律以及实验数据，直到19世纪中期，伟大的麦克斯韦，将电、磁、光这三门看上去不同的学术，统一在了麦克斯韦方程中，麦克斯韦方程组是经典电磁学的基础方程， ...

Aging is an inevitable progressive decline in physiological organ function that increases the chance of disease and death. The renin–angiotensin system (RAS) is involved in the regulation of ...

The Week is part of Future US Inc, an international media group and leading digital publisher. Visit our corporate site.