如何获得具有垂直可滚动卡片文本部分的固定高度bootstrap 4 卡片？
<div class="card" style="height:300px"> <-- non scrollable
<div class="card-body"> <-- non scrollable
<h5 class="card-title">Card title</h5> <-- non scrollable
<p class="card-text">This portion and only this portion will have a very long text so much so that the vertical scroll bar may appear when required.</p>
</div>
</div>