Their standard model treats the universe as though its density did not vary from place to place but had a uniform, average value of one atom per cubic meter. 标准模型将宇宙视为一个均匀结构,密度不会随著空间位置而变化,每立方公尺平均有一个原子。
Application of SYG-II type of intelligent cool-atom fluorescence mercury meter in water environment inspection SYG-II型智能冷原子荧光测汞仪在水环境监测中的应用