设B是一个复的向量空间，它是由环链在平环上的简单闭曲线生成。

Let B be a complex vector space generated by some simple closed curves in the annulus.

youdao

设B是一个复的向量空间，它是由环链在平环上的简单闭曲线生成。

Let B be a complex vector space generated by some simple closed curves in the annulus.

youdao