A MOOC (say it like “mook”) is a massive open online course: a course on the internet that a very large number of people can take, often for free or for little money. Massive means thousands of students at once; open means, in principle, anyone may join; online means it lives on the web; course means there are lessons, not just a random video.

A MOOC (say it like "mook")MOOC（唸法像「mook」） is a massive open online course是massive open online course（大規模開放線上課程）的縮寫： a course on the internet that a very large number of people can take一種在網路上、非常多人都能上的課， often for free or for little money通常免費或只要一點點錢。 Massive means thousands of students at onceMassive（大規模）指同時有好幾千個學生； open means, in principle, anyone may joinopen（開放）原則上表示任何人都可以加入； online means it lives on the webonline（線上）表示它在網路上； course means there are lessons, not just a random videocourse（課程）表示有課可上，不只是一支隨便的影片。

Universities and companies put up a wave of these in the early 2010s. You take a MOOC, sign up for a MOOC, finish a MOOC.

Universities and companies put up a wave of these in the early 2010s大學和公司在2010年代初期，推出了一波這樣的課程。 You take a MOOC, sign up for a MOOC, finish a MOOC你可以take（上）一門MOOC、sign up for（報名）一門MOOC、finish（完成）一門MOOC。

People still sometimes say the letters M-O-O-C, but the usual pronunciation is one syllable. Though actually, “open” is used a bit loosely: some MOOCs are free to watch but charge you for a certificate.

People still sometimes say the letters M-O-O-C人們有時候還是會一個字母一個字母唸M-O-O-C， but the usual pronunciation is one syllable但一般的唸法是唸成一個音節。 Though actually不過其實， "open" is used a bit loosely「open（開放）」這個詞用得有點鬆散： some MOOCs are free to watch but charge you for a certificate有些MOOC看課是免費的，但要拿證書就得付費。