[code] # global trimming options -f, --trim_front1 trimming how many bases in front for read1, default is 0 (int [=0]) -t, --trim_tail1 trimming how many bases in tail for read1, default is 0 (int [=0]) -F, --trim_front2 trimming how many bases in front for read2. If it's not specified, it will follow read1's settings (int [=0]) -T, --trim_tail2 trimming how many bases in tail for read2. If it's not specified, it will follow read1's settings (int [=0])[/code][code]官方的说明里边有这么个参数，刚好分别是去除fq1、fq2的头部尾部指定长度的碱基，根据这个试一下看看？ [/code]