一、《Vudu》

很多欧美老电影在线观看无中文

Vudu – Rent, Buy, Watch Movies & TV Online(https://www.vudu.com/content/movies/home)Rent, buy, and watch movies and TV shows with Vudu. Watch online or on your favorite connected device with the Vudu app. No subscription, free sign up. Rent or buy the latest releases in up to 4K + HDR before they’re available on DVD, and watch TV shows by episode or season. Plus, watch over 4,500 free movies on Vudu Movies On Us.详情

二、《Khan Academy》

内容丰富，涵盖数学、历史、医疗卫...

Khan Academy(https://www.khanacademy.org/)首先最重要的是免费！其次内容丰富，涵盖数学、历史、医疗卫生及医学、金融、物理、化学、生物、天文学、经济学、宇宙学、有机化学、美国公民教育、美术史、宏观经济学、微观经济学及计算机科学等详情