Why is yawning contagious? - Claudia AguirreTED-Ed·중급·4:29·139 wpm정보좋아요저장공유0:000:00재생 속도0.5×0.75×1×1.25×1.5×1010TED-Ed의 다른 영상5:04The benefits of a bilingual brain - Mia NacamulliTED-Ed중급141 wpm12:08Questions No One Knows the Answers to (Full Version)TED-Ed중급149 wpm4:05What are those floaty things in your eye? - Michael MauserTED-Ed중급149 wpm4:20What makes muscles grow? - Jeffrey SiegelTED-Ed중급141 wpm
