2. The reversion rule designates a remainder in the heirs of the grantor or testator. 复归权规则则赋予出让人或遗嘱人的继承人一项复归权。
3. The course of integration abides by dialectical materialism epistemology law, with the characteristics of progressiveness and reversion. 融合的进程遵循辨证唯物主义认识论的规律，具有递进性和回复性的特点。
英英解释
n.
1. (law) an interest in an estate that reverts to the grantor (or his heirs) at the end of some period
2. a return to a normal phenotype (usually resulting from a second mutation)
3. a reappearance of an earlier characteristic
4. turning in the opposite direction
5. returning to a former state
6. a failure to maintain a higher state
