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p.ex1 {
margin-bottom: 2em;
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<h1>The margin-bottom Property</h1>
<p>A paragraph with no margins specified.</p>
<p class="ex1">A paragraph with a 2 em bottom margin. The em unit is relative to the font-size of the element (2em means 2 times the size of the current font).</p>
<p>A paragraph with no margins specified.</p>
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