擅长:python、mysql、java
<p>对于GNU grep和<a href="https://perldoc.perl.org/perlre.html" rel="nofollow noreferrer">Perl regular expression</a>(<code>-P</code>):</p>
<pre><code>grep -Po '(silence_start: |silence_end: |time=)\K[0-9:.]+' file
</code></pre>
<p>输出:</p>
<pre>
1.32515
1.88188
2.99698
3.42311
5.58311
6.13984
7.6729
00:00:09.12
</pre>