Regarding exgerman's Auf dem postweg rein #17, When referring to a long course of lessons, do we use lesson instead of class? 知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 Actually, they keep using these two words just like this all the time. Hinein one and the same Liedertext they use "at a lesson" and https://youtu.be/T0zWXvhEQwo?si=wNc6ihu97ShtIl7u