SOURCE

<style>
    .box{
        width:100%;
        border:1px solid red;
        display:flex;
        justify-content: space-between;

    }
    .left{
        flex:none;
        margin-right:20px;
    }
    .lbyf-trans{
        display: flex;
        flex-wrap: nowrap;
        overflow:hidden;
    }
    .nickname{
        flex:1;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .num{
        flex:none;
    }
</style>

<div class="box">
    <span class="left">时间</span>
    <span class="lbyf-trans">
        <span class="nickname">来自&nbsp;阿阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗阿狗</span>
        <span class="num">(1000003682)</span>
    </span>
</div>