【TED】預防阿茲海默症，你可以這樣做！| Lisa Genova (【TED】What you can do to prevent Alzheimer's | Lisa Genova)┃VoiceTube 看影片學英語
How many people here would like to live to be at least 80 years old?
在這裡有多少人希望至少活到80歲？