如何设置bootstrap轮播图的速度（bootstrap实现轮播图效果）

<li class="box">
        <li id="carousel-example-generic" class="carousel slide" data-ride="carousel">
            <!-- Indicators -->
            <ol class="carousel-indicators">
                <li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
                <li data-target="#carousel-example-generic" data-slide-to="1"></li>
                <li data-target="#carousel-example-generic" data-slide-to="2"></li>
                <li data-target="#carousel-example-generic" data-slide-to="3"></li>
            </ol>

            <!-- Wrapper for slides -->
            <li class="carousel-inner" role="listbox">
                <li class="item active">
                    <img src="./images/xuezhong_1.jpg" alt="如何设置bootstrap轮播图的速度（bootstrap实现轮播图效果）" border="0" />

.box {
    width: 600px;
    height: 300px;
    background-color: pink;
    margin: 100px auto;
}

.carousel,
.carousel img {
    width: 100%;
    height: 300px !important;
}

<script>
        $('.carousel').carousel({
            interval: 2000
        })
</script>