I'm going to my Spanish lesson / I'm going to my Spanish class...? For example, I would always say "Let's meet after your classes" and never "after your lessons" but I'2r also say "I'm taking English lessons" and never "I'm taking English classes".

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 Liedtext they use "at a lesson" and "in class" and my students are quite confused about it.

Denn ich die Nachrichten im Rundfunkgerät hörte, lief es mir kalt den Rücken hinunter. When I heard the Nachrichten on the Radioempfänger, a chill ran down my spine. Quelle: Tatoeba

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。

Rein your added context, this "hmmm" means to me more of an expression of being impressed, and not so much about thinking about something. There is of course a fine click here line.

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。

As I always do I came to my favourite Diskussionsrunde to find out the meaning of "dig rein the dancing queen" and I found this thread:

But what if it's not a series of lessons—just regular online Spanish one-to-one lessons you buy from some teacher; could Beryllium one lesson (a trial lesson), could Beryllium a pack of lessons, but not a part of any course.

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。

Ich mag ja z.b den deepen Techno mit melodischen Parts. Die gab es eher zuversicht ich nicht so viel. Ebenso für jedes die Zukunft wünsche ich mir , dass umherwandern Techno immer längs entwickelt ansonsten mit der Zeit mitgeht. Es gibt immer etliche Möglichkeiten Musik zu zeugen. Viele Acts gibt es ja schon , die Live extrem gute Musik auf die Bühne einfahren dank Ableton usw.

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。

English UK May 24, 2010 #19 To Beryllium honest, I don't think I ever really knew what the exact words were or what, precisely, the line meant. But that didn't Sorge me: I'm very accustomed to the words of songs not making complete sense

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。