{"version":"1.0","type":"rich","provider_name":"Acast","provider_url":"https://acast.com","height":250,"width":700,"html":"<iframe src=\"https://embed.acast.com/$/67e540b5bf74401b77063d1f/67e77bdf59009cabb2d43ae5?\" frameBorder=\"0\" width=\"700\" height=\"250\"></iframe>","title":"一支铅笔的奇妙旅程","thumbnail_width":200,"thumbnail_height":200,"thumbnail_url":"https://open-images.acast.com/shows/67e540b5bf74401b77063d1f/03996b61-faa4-4825-9f6b-7b698ca2a0bf.png?height=200","description":"✏️ 揭秘铅笔背后的历史，从石墨误认为铅的开始。\n🌍 探究HB、2B与4B标记的由来，德国和法国的工匠创新。\n🎌 感受日本经典品牌蜻蜓、三菱和黑翼的极致工艺。\n✨ 学习更好保养和使用铅笔的贴士。\n\n现在拿起铅笔，重新探索纸笔之间的美妙吧！","author_name":"高贵的大猩猩"}