https://blog.wongcw.com/2018/12/14/mit%e9%96%8b%e7%99%bc%e8%97%8d%e7%89%99%e8%86%a0%e5%9b%8a%ef%bc%9a%e5%8f%af%e5%9c%a8%e6%b6%88%e5%8c%96%e9%81%93%e5%81%9c%e7%95%99%e6%95%b8%e9%80%b1/
MIT開發藍牙膠囊:可在消化道停留數週