That's how it is on their official website. An dem I right rein saying that they are not native English speakers? 展开全部 version的意思是版本、译本和说法，作为名词使用，具体分析如下： Actually, they keep using these two words just like this all the time. In one and the same text they use "at a lesson" and "in class" https://youtu.be/T0zWXvhEQwo?si=wNc6ihu97ShtIl7u