擅长:python、mysql、java
<p>下面的<a href="https://www.gnu.org/software/gawk/manual/gawk.html" rel="nofollow noreferrer">^{<cd1>}</a>(对于<a href="https://www.gnu.org/software/gawk/manual/html_node/String-Functions.html" rel="nofollow noreferrer">^{<cd2>}</a>扩展)可能适用于您:</p>
<pre><code>awk '{for(i=2;i<=NF;i++){print $1 gensub(/_([^_]+)$/,"\n\\1",1,$i)}}' file
</code></pre>