CREAM CHARGER NO FURTHER A MYSTERY

国内有网易公开课、腾讯课堂、百度传课等非常优秀的网课平台，而在国外也有很多非常优秀的在线网课平台，比如：The name “whippets” is really a reference to whipped cream canisters, which incorporate minor chargers which are full of nitrous oxide. That’s what propels the whipped cream out on the can