问如何检测句点之间包含<span>标记的<p>标记中的句子

EN

   for(const span of document.querySelectorAll("p span")) {
      const prevText = span.previousSibling.data;
      const afterText = span.nextSibling.data;
      const prev = prevText.slice( prevText.lastIndexOf(".") );
      comst after = afterText.slice(0, afterText.indexOf("."));
       // do whatever you wanna do here
   }

<p>The sun is <span>shining</span> today</p>
<p>Let's refactorate it</p>
<p>Nice. It's a <span>special day</span> of celebration</p>

var sentences = [];

document.querySelectorAll('p span').forEach(function(span) {
    var sentencesText = span.parentNode.innerText.split('.');
    span.parentNode.innerHTML.split('.').forEach(function(sent, i) {
        if (sent.indexOf("<span>") != -1) {
            sentences.push(sentencesText[i]);
        }
    })
});

"The sun is shining today"
"It's a special day of celebration"

const p=document.getElementsByTagName('p')[0].innerHTML;
p.split(".").forEach(e=>{
  if(e.indexOf('span')>0){
    console.log(e);
  }
});

<p>The phospholipid heads face outward, one layer exposed to the interior of the cell and one layer exposed to the exterior. Because the <span>phosphate</span> groups are polar and hydrophilic, they are attracted to water in the intracellular fluid. Intracellular fluid (ICF) is the fluid interior of the cell.</p>