preimage 原像†，前像
数据库 数据库管理系统及其实现技术 释文 before-image 前像
- quasi-optical circuits
- quasi optical coupling
- quasi-optical coupling
- quasi-optical feed
- quasi-optical wave
- quasi optics imaging
- quasi-optics imaging
- quasi-optic technique
- quasi-optimum strategy
- quasi-order
- quasi-ordered
- quasi-ordered class
- quasi-ordered group
- quasi-ordered semigroup
- quasi-ordered set
- quasi-ordering
- quasi-ordering structure
- quasi-order relation
- quasi-orthogonal
- quasi-orthogonal polynomial
- quasi-orthogonal system
- quasi-oscillation
- quasi-parabolic
- quasi-paracomplex
- quasi-particle