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README.md

@@ -75,6 +75,8 @@ optional arguments:
 | -n/--num       | the max number of concurrency, auto detect by sra file size  |
 | -s/--max-speed | maximum speed per second, case-insensitive unit support (K[b], M[b]...), no-limited by default |
 
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 #### 3.2 srautils dump
 
 The `dump` command is a parallel `fastq-dump` wrapper which used for dump SRA file and get the raw `fastq/fasta` sequence data as output. 
@@ -114,6 +116,8 @@ optional arguments:
 | --fasta      | output fasta instead of fastq                                |
 | --local      | running all chunked jobs in localhost instead of sge cluster |
 
+![dump](https://user-images.githubusercontent.com/18365846/201566132-b3d8e0d3-426e-44f5-b9d6-6db58020dbff.png)
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 ### 4. License
 
 `srautils` is distributed under the [MIT License](https://github.com/yodeng/srautils/blob/master/LICENSE).