再次键入2，以选择“a specific character”，然后在询问匹配哪个字符时键入t。

Type 2 again to select "a specific character" and then type t when asked which character to match.

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当然，如果不确定哪些字符集可用，您需要用下面的语句来询问。

Of course, if you aren't sure which character sets are available, you need to ask.

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本文提出了一种聚类的多解析度字符串索引结构，用于解决生物序列的相似性查询问题。

This paper proposed a Clustered Multi Resolution String index structure to solve the problem of sequence similarity query.

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