各位好，有件事实在弄不明白，求助。看了篇老外的论文，方法用到的如下程序，据说是R语言的，谁能帮忙解释一下。知识是有价值的，如果解释合理，我愿意当面求教，支付咨询费，价格可以谈。谢谢
如下：
TN93

This is a simple program meant to compute pairwise distances between aligned nucleotide sequences in sequential FASTA format using the Tamura Nei 93 distance.

To build, you need to use cmake. Type

$cmake [-DCMAKE_INSTALL_PREFIX=/install/path DEFAULT /usr/local/] ./$make installusage: tn93 [-h] [-o OUTPUT] [-t THRESHOLD] [-a AMBIGS] [-l OVERLAP][-d COUNTS_IN_NAME] [-f FORMAT] [-s SECOND_FASTA] [-b] [-c] [-q] [FASTA]