An interesting problem in the study of bifurcation theory is to determine when two bifurcation problems are equivalent with respect to some group of equivalences.
在什么条件下两个分歧问题关于某一等价群而言是等价的，这在分歧理论研究中是很有意义的。
2
The rate of living theory would have predicted that the running group that expended more energy would die earlier than the two groups that did not, Vaanholt said.
Vaanholt说，也许生存成本理论会预测说奔跑组消耗更多能量，将会比其他两组死得更早。
3
The physical parameters of the reactor core are calculated by method of the two-grouptheory.