1. 对合：大的篇幅.在德扎格创用的所有术语中,也只有对合(involution)这个词沿用下来.德扎格的对台定义是这样的:圆锥曲线问题是德扎格研究的一个重要课题.古希腊数学家阿波罗尼奥斯的<<圆锥曲线论>>(Conics)对圆锥曲线问题作了完整的总结,
noun
1. the action of enfolding something
Synonym: enfolding
2. the process of raising a quantity to some assigned power
Synonym: exponentiation
3. the act of sharing in the activities of a group
e.g. the teacher tried to increase his students' engagement in class activities
Synonym: engagement participation involvement
4. marked by elaborately complex detail
Synonym: elaborateness elaboration intricacy
5. a long and intricate and complicated grammatical construction
6. reduction in size of an organ or part (as in the return of the uterus to normal size after childbirth)