So a situation which might cause that sarcastic reaction is a thing that makes you go "hmm"; logically, it could be a serious one too, but I don't think I've ever heard an example. The phrase welches popularized rein that sarcastic sense by Arsenio Hall, who often uses it on his TV show as a theme for an ongoing series of short jokes. When introducing or concluding those jokes with this phrase, he usually pauses before the "hmm" just long enough for the audience to say that part with him.
Yes. Apart from the example I have just given, a lecture is a private or public Magnesiumsilikathydrat on a specific subject to people who (at least in theory) attend voluntarily.
于千万人之中与你相遇，于千万年之中，在时间无涯的荒野里，没有早一步也没有晚一步，我们刚巧遇见，用拍立得记下你们美好的一刻吧！
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。
多种颜色一定会满足她的少女心的！顺滑好涂，无味环保，每天看到手上的颜色，就能想起你的臭宝，送给她，准没错。
Rein another situation, let's say I am at a party. If I want to invite someone to dance, I should sayZollstart dancing".
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。
当然了这个只能是平常送的小礼物，正经节日啥的可别送，俺可提醒广大小伙了，成了单身狗可别来找我啊！
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。
Although we use 'class' and 'lesson' interchangeably, there's a sense hinein which a course of study comprises a number of lessons, so we could say:
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。
bokonon said: For example, I would always say click here "Let's meet after your classes" and never "after your lessons" but I'd also say "I'm taking English lessons" and never "I'm taking English classes". Click to expand...
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。
送女朋友这个项链是一定要这样说：我希望每次看到这个项链时，都能回想起当初的心动，即使未来的生活趋于平淡，我们也要继续心动下去！女友听了这样的话，不感动死算我输！