잠겨있는 밀폐된 방에서도 먼지가 생기는 이유

<div class="figure-img" data-ke-type="image" data-ke-style="alignCenter" data-ke-mobilestyle="widthOrigin" data-link="https://cafe.daum.net/subdued20club" data-link-newwindow="_blank"><a href="https://cafe.daum.net/subdued20club" target="_blank" class="ke-link"><img src="https://t1.daumcdn.net/cafeattach/1IHuH/c66b4a1a23c64192bd183f48a1868843d96257d5" width="288" height="288" data-img-src="https://t1.daumcdn.net/cafeattach/1IHuH/c66b4a1a23c64192bd183f48a1868843d96257d5" data-origin-width="1024" data-origin-height="1024"></a></div><p style="text-align: center;">출처: 여성시대 aliexpress<br><a href="https://youtu.be/aJF9TiPDXaI?si=M1Unvkpmo_OC0VSq" target="_blank" class="ke-link">https://youtu.be/aJF9TiPDXaI?si=M1Unvkpmo_OC0VSq</a></p><div class="figure-video" data-ke-type="video" data-video-url="https://www.youtube.com/watch?v=aJF9TiPDXaI" data-video-host="youtube" data-video-play-service="daum_cafe" data-video-width="1280" data-video-height="720" data-ke-style="alignCenter" data-video-thumbnail="http://scrap.kakaocdn.net/dn/dUAmim/dJMb9efd8Qy/uyDgnQdn6Qhp4igU2DQbk1/kakaolink40_original.jpg?width=1280&height=720" data-ke-mobile-mobileStyle="widthFull" data-video-origin-width="1280" data-video-origin-height="720"><iframe src="https://www.youtube.com/embed/aJF9TiPDXaI" width="1280" height="720" frameborder="0" scrolling="no" allowfullscreen=""></iframe><div class="figcaption"></div></div><p style="text-align: center;"><br>이거 항상 궁금했음,,,<br>가만히 있는데 왜 먼지가 쌓이냐고!!!!</p><div class="figure-img" data-ke-type="image" data-ke-style="alignCenter" data-ke-mobilestyle="widthOrigin"><img src="https://t1.daumcdn.net/cafeattach/1IHuH/7c6cfeb6c290e5eae583726c5e51700e749cd03e" class="txc-image" data-img-src="https://t1.daumcdn.net/cafeattach/1IHuH/7c6cfeb6c290e5eae583726c5e51700e749cd03e" data-origin-width="1024" data-origin-height="472"></div><div class="figure-img" data-ke-type="image" data-ke-style="alignCenter" data-ke-mobilestyle="widthOrigin"><img 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