SOURCE

<div class="test_box">
   <span class="test_inline">

  </span>  
   <span class="test_text">kkk</span>
</div>
<div class="test_box" style="height:40px;margin-top:0"></div>

.test_box {
  //font-size:60px;
  line-height:90px;
  margin-top: 40px;
  width: 600px;
  border: 1px solid #a0b3d6;
  //vertical-align:top;
}

.test_inline {
  //line-height: 90px;
 // font-size: 45px;
  height:30px;
  width:40px; 
  border: 1px solid red;
  display: inline-block;
  vertical-align: middle;;;;;;
} 

.test_text {
  line-height:90px;
  //line-height: 100px;
  font-size: 20px;
  display:inline-block;;;;
  border: 1px solid red;
  vertical-align:bottom;;;;;
}