Twitter bootstrap 如何在Bootstrap[库存系统]中对齐配料表

我正在为我的库存系统创建一个配方页面。我对配料部分的布局有问题。我正在使用Twitter引导。这就是我希望发生的事情：

        <!--Quantity -->
            <div class="col-md-1">
                <input class="form-control" id="qty" type="text" placeholder="Qty">
            </div>

        <!--Unit of Ingredient -->
            <div class="col-md-4">
                <div class="dropdown">
                <form class="form-inline">
                    <button class="btn btn-default dropdown-toggle" type="button" id="unitIngredient" data-toggle="dropdown" aria-expanded="true"> 
                    Unit of Ingredient
                        <span class="caret"></span>
                    </button>

                    <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1"> 
                        <li role="presentation"><a href="#">Pack/s</a></li>
                        <li role="presentation"><a href="#">Liter/s</a></li>
                    </ul>
                </div>

        <!--Ingredient Name-->
                <div class="dropdown">
                    <button class="btn btn-default dropdown-toggle" type="button" id="nameIngredient" data-toggle="dropdown" aria-expanded="true"> Ingredient Name
                        <span class="caret"></span>
                    </button>

                    <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu2"> 
                        <li role="presentation"><a href="#">Meat </a></li>
                    </ul> 
                </div>
                </form>
            </div>


        <!-- Button to delete row of ingredient in the recipe -->

            <div class="col-md-2">
                <button type="button" class="close" aria-label="Close"><span aria-hidden="true">&times;</span></button>
            </div>

以下是我的配料部分代码：

        <!--Quantity -->
            <div class="col-md-1">
                <input class="form-control" id="qty" type="text" placeholder="Qty">
            </div>

        <!--Unit of Ingredient -->
            <div class="col-md-4">
                <div class="dropdown">
                <form class="form-inline">
                    <button class="btn btn-default dropdown-toggle" type="button" id="unitIngredient" data-toggle="dropdown" aria-expanded="true"> 
                    Unit of Ingredient
                        <span class="caret"></span>
                    </button>

                    <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1"> 
                        <li role="presentation"><a href="#">Pack/s</a></li>
                        <li role="presentation"><a href="#">Liter/s</a></li>
                    </ul>
                </div>

        <!--Ingredient Name-->
                <div class="dropdown">
                    <button class="btn btn-default dropdown-toggle" type="button" id="nameIngredient" data-toggle="dropdown" aria-expanded="true"> Ingredient Name
                        <span class="caret"></span>
                    </button>

                    <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu2"> 
                        <li role="presentation"><a href="#">Meat </a></li>
                    </ul> 
                </div>
                </form>
            </div>


        <!-- Button to delete row of ingredient in the recipe -->

            <div class="col-md-2">
                <button type="button" class="close" aria-label="Close"><span aria-hidden="true">&times;</span></button>
            </div>

//继续

        <!--Quantity -->
            <div class="col-md-1">
                <input class="form-control" id="qty" type="text" placeholder="Qty">
            </div>

        <!--Unit of Ingredient -->
            <div class="col-md-4">
                <div class="dropdown">
                <form class="form-inline">
                    <button class="btn btn-default dropdown-toggle" type="button" id="unitIngredient" data-toggle="dropdown" aria-expanded="true"> 
                    Unit of Ingredient
                        <span class="caret"></span>
                    </button>

                    <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1"> 
                        <li role="presentation"><a href="#">Pack/s</a></li>
                        <li role="presentation"><a href="#">Liter/s</a></li>
                    </ul>
                </div>

        <!--Ingredient Name-->
                <div class="dropdown">
                    <button class="btn btn-default dropdown-toggle" type="button" id="nameIngredient" data-toggle="dropdown" aria-expanded="true"> Ingredient Name
                        <span class="caret"></span>
                    </button>

                    <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu2"> 
                        <li role="presentation"><a href="#">Meat </a></li>
                    </ul> 
                </div>
                </form>
            </div>


        <!-- Button to delete row of ingredient in the recipe -->

            <div class="col-md-2">
                <button type="button" class="close" aria-label="Close"><span aria-hidden="true">&times;</span></button>
            </div>

将class=容器替换为class=容器文本中心

        <!--Quantity -->
            <div class="col-md-1">
                <input class="form-control" id="qty" type="text" placeholder="Qty">
            </div>

        <!--Unit of Ingredient -->
            <div class="col-md-4">
                <div class="dropdown">
                <form class="form-inline">
                    <button class="btn btn-default dropdown-toggle" type="button" id="unitIngredient" data-toggle="dropdown" aria-expanded="true"> 
                    Unit of Ingredient
                        <span class="caret"></span>
                    </button>

                    <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu1"> 
                        <li role="presentation"><a href="#">Pack/s</a></li>
                        <li role="presentation"><a href="#">Liter/s</a></li>
                    </ul>
                </div>

        <!--Ingredient Name-->
                <div class="dropdown">
                    <button class="btn btn-default dropdown-toggle" type="button" id="nameIngredient" data-toggle="dropdown" aria-expanded="true"> Ingredient Name
                        <span class="caret"></span>
                    </button>

                    <ul class="dropdown-menu" role="menu" aria-labelledby="dropdownMenu2"> 
                        <li role="presentation"><a href="#">Meat </a></li>
                    </ul> 
                </div>
                </form>
            </div>


        <!-- Button to delete row of ingredient in the recipe -->

            <div class="col-md-2">
                <button type="button" class="close" aria-label="Close"><span aria-hidden="true">&times;</span></button>
            </div>