真空区 meaning in Chinese

airless space
empty space
region of no pressure

Polycrystalline silicon - examination method - vacuum zone - melting on boron
硅多晶真空区熔基硼检验方法
In 1909 , ernest rutherford showed that atoms were mostly empty space , revising the model of an atom to a tight positive nucleus containing the protons and neutrons with electrons around it ; by 1913 , danish physicist neils bohr envisioned a planetary arrangement in which the electrons orbited the nucleus at different energy levels
在1909年，欧内斯特?卢瑟福展示原子大部分是真空区，修正的原子模型就是紧密的阳性核包含质子和中子，电子围绕中子旋转；到1913年，丹麦物理学家尼尔?波尔想象了一个电子以不同能量水平面围绕原子核旋转的行星排列。