Sass .scss: Nesting and multiple classes?

I’m using Sass (.scss) for my current project.

Following example:

HTML

<div class="container desc">
    <div class="hello">
        Hello World
    </div>
</div>

SCSS

.container {
    background:red;
    color:white;

    .hello {
        padding-left:50px;
    }
}

This works great.

Can I handle multiple classes while using nested styles.

In the sample above I’m talking about this:

CSS

.container.desc {
    background:blue;
}

In this case all div.container would normally be red but div.container.desc would be blue.

How can I nest this inside container with Sass?