Edit in JSFiddle

<em>
<span class="wrap">着<span>●</span></span>
<span class="wrap">重<span>●</span></span>
<span class="wrap">符<span>●</span></span>
<em>

.wrap {
    position: relative;
    font-style: normal;
    font-size: 16px;
}
.wrap span {
    position: absolute;
    bottom: -0.5em;
    left: 0;
    width: 200%;
    text-align: center;
    font-size: 1em;
    line-height: 1em;
    height: 1em;
    -webkit-transform: scale(0.5);
    -ms-transform: scale(0.5);
    transform: scale(0.5);
    -webkit-transform-origin: left bottom;
    -ms-transform-origin: left bottom;
    transform-origin: left bottom;
}