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 has been said above, the specific verb and the context make a difference, and discussing all of them in one thread would Beryllium too confusing.

Yes. Apart from the example I have just given, a lecture is a private or public talk on a specific subject to people who (at least in theory) attend voluntarily.

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Actually, they keep using these two words just like this all the time. Rein one and the same Liedtext they use "at a lesson" and "rein class" and my students are quite confused about it.

神仙水不用太怎么介绍，这个东西只要你给女友买，她绝对绝对喜欢！不信问问身边的女性朋友就知道了！

There may also be a question of style (formal/conversational). There are many previous threads asking exactly this question at the bottom of this page.

There are other verbs which can be followed by the -ing form or the to +inf form with no effective difference hinein meaning. Teich this page (englishpage.net):

如果女朋友没吃过，一定送她这个尝尝，让她感受一下，放入口中，就消失的魔法！

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

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 "hinein class" and click here my students are quite confused about it.

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！

the lyrics of a well-known song by the Swedish group ABBA (too bad not to Beryllium able to reproduce here the mirror writing of the second "B" ) feature the following line:

And many thanks to Matching Mole too! Whether "diggin" or "dig in", this unusual wording is definitely an instance of Euro-pop style! Not that singers Weltgesundheitsorganisation are native speakers of English can generally Beryllium deemed more accurate, though - I think of (hinein)famous lines such as "I can't get no satisfaction" or "We don't need no education" -, but at least they know that they are breaking the rules and, as Kurt Vonnegut once put it, "our awareness is all that is alive and maybe sacred in any of us: everything else about us is dead machinery."