小编saj*_*adi的帖子

table, th, td {
    border: 1px solid black;
    border-collapse: collapse;
    
}
.container {
  width: 100px;
  height: 1px;
  background-color: black;
  position: relative;
}
.circle {
  display: inline-block;
  vertical-align: middle;
  width: 40px;
  height: 40px;
  background-color: white;
  border: solid 1px black;
  border-radius: 50%;
  position: absolute;
  top: -6px;
  left: calc(50% - 5px);
}

<table style="width:100%">
  <tr>
    <th>Firstname</th>
    <th>Lastname</th> 
    <th>Age</th>
  </tr>
  <tr>
    <td>Eve</td>
    <td>
      <div class="container">
        <div class="circle">test</div>
      </div>
    </td> 
    <td>94</td>
  </tr>
</table>