还可以通过各字符串的序列来聚合字符串，新增的string - join函数以序列为参数，这与concat有所不同，它可以有很多参数，每个参数要求是字符串。
You can also aggregate strings from a sequence of strings: the new string-join function takes a sequence as an argument, unlike concat , which takes many arguments, each being a string.
这是 2.0 中新增加的函数，也可用于测试本系列 第 3 部分 所述的三个可选特性模块：模式感知、 向后兼容 和序列化。
New for 2.0, this function can also test for all three optional feature modules described in Part 3 of this series: Schema Awareness, Backwards Compatibility, and Serialization.
如果CDD工作人员无法在这些源数据库记录中找到序列的新增编号，可以通过BLAST对相应序列进行定位。
If the CDD staff cannot find the Accession Numbers for the sequences in the records from the source databases, they locate appropriate sequences using BLAST.
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