Maybe I'm missing the point of this question, but the double quotes allow you to include variables. E.G.: 
$var = 'foo';
$str = "abc $var def";
print $str;

abc foo def

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if you want to actually include single quotes in the $str, then escape them: 
$str = "\'abc $var def\'";
print $str;

'abc foo def'

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In reply to Re: Interpolating variables in a string by perlcapt
in thread Interpolating variables in a string by saintmike

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