Eine Überprüfung der Trance
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。
If the company he works for offers organized German classes, then we can say He sometimes stays at the office after work for his German class. After the class he goes home.
„The centerpiece of the Rave experience is a style of music called "Techno House", the latest Verknüpfung hinein a never ending evolution of Dance music…“.
The wording is rather informally put together, and perhaps slightly unidiomatic, but that may be accounted for by the fact that the song's writers are not English speakers.
戚薇同款星兔保温杯，女生用杯子，主要是看颜值，送这个准没错，这颜值！！
Hinein 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 line.
Ich muss Leute ausfindig machen, mit denen ich read more chillen kann. I need to find people to chill with. Brunnen: Tatoeba
For example, I would always say "Let's meet after your classes" and never "after your lessons" but I'kreisdurchmesser 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。
This sounds a little unnatural. Perhaps you mean he was telling the employee to go back to his work (because the employee was taking a break). I'durchmesser eines kreises expect: Please get back to your work hinein such a situation.
Pferdestärke - Incidentally, hinein BE to take a class could well imply that you were the teacher conducting the class.
外观可爱，音质非常棒，还能听收音机哦！还送精美的手提箱，然后给她一个写满情话的卡片，简直太好了吧！
前调是清新的水果香气，接着是带着水果酸调的花果香，恰到好处的中和了花香的甜腻，尾调是沉稳的木香，给人温润如玉的感觉。可爱的泰迪熊，送女友非常的合适！
This can Beryllium serious if we really believe that ur new knowledge calls for serious thought, or it can be sarcastic, to express how obvious something is, especially if it seems like it shouldn't have been obvious (should have been hidden) or if something is wrong about it, such as somebody doing something (s)he shouldn't do, or two people contradicting each other when they should Beryllium on the same side.