With regard to uniqueness, the author improved the results of Yang Le, Yi Hongxun and Fang Mingliang, and obtains a series of uniqueness theories.

在唯一性方面，作者推广了杨乐，仪洪勋和方明亮的结果，得到了一系列的唯一性定理。

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Tong Le Fang was established in 1928, it was a cluttering zone of lance factories in the last century.

始建于1928年的老上海同乐坊曾经是上海最著名的弄堂工厂集聚区。

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Tong Le Fang was established in 1928, it was a cluttering zone of lance factories in the last century.

始建于1928年的老上海同乐坊曾经是上海最著名的弄堂工厂集聚区。

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