定理1（极限的唯一性）如果数列收敛，那么它的极限唯一。
Theorem 1 (Uniqueness of Limit) If the sequence is convergent, then its limit is unique.
对一个自催化反应振动模型作了全局分析，讨论了其极限环的存在与唯一性，给出了其分枝曲面方。
The existence and uniqueness of limit cycles are discussed, and the equation of bifurcation surfaces is obtained.
本文研究一类生化系统的极限环的存在性与唯一性；
The existence and uniqueness of limit cycles of a biochemical system is proved.
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