垂直居中，容器高度固定，内容高度不定

verticle-center

* {
    margin: 0;
    padding: 0;
}
.cont {
    background-color: #ccc;
    font-size: 24px;
    height: 150px;
    text-align: center;
    overflow: hidden;
    width: 280px;
}
.cont .inner,
.cont .v {
    display: inline-block;
    zoom: 1;*display: inline; /* 用于触发支持IE67 inline-block */
}
.cont .inner {            
    line-height: 1.8;
    padding: 0 4px 0 5px;
    vertical-align: middle;
    width: 262px;           
}
.cont .v {
    line-height: 150px;
    text-indent:-9999px;
    width: 1px;         
}

<div class="cont">
    <div class="inner">比较满意比较满意比较满意</div><div class="v">cssHack</div>
</div>