<!-- 16:9 aspect ratio -->
<div class="embed-responsive embed-responsive-16by9">
	<iframe class="embed-responsive-item" src="…"></iframe>
</div>

<!-- 4:3 aspect ratio -->
<div class="embed-responsive embed-responsive-4by3">
	<iframe class="embed-responsive-item" src="…"></iframe>
</div>
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디츠

“말은 쉽지, 코드를 보여줘.” “Talk is cheap. Show me the code.” – 리누스 토르발스(Linus Torvalds)

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