空间近视 empty-field myopia

多项式时间近似方案 PTAS ; polynomial time approximation scheme

弛豫时间近似 Relaxation-time approximation

线对间近端串扰 NEXT

空间近距 spatial proximity

超越弛豫时间近似 beyond the relaxation-time approximation

组织间近距离治疗 Interstitial Brachytherapy

离散时间近似 Discrete-time approximation

中间近似 intermediate approximation