moov.牛哞哞叫n.牛鸣声Mooki穆基moolin.白萝卜moolan.<俚>金钱Moosai穆赛Moolan穆兰moomoo夏威夷女长装Moominn.(芬兰童话中矮胖、害羞并冬眠的)森林小人Moossan.穆萨Mooersn.穆尔斯Moomba蒙巴

1. MOOCs have become highly popular in the last couple of years in the United States, where the concept evolved.
   慕课在线学习平台的概念诞生于美国，并在最近数十年中在美国掀起了一股在线学习热潮。