如果是在正式场合下，我应当如何对他表示感激呢？
How about on a formal occasion? What should I say to show my gratitude?
在非正式场合没有投影仪的情况下，即时演示将越来越普遍。
Instant presentations in informal settings could become more common when there isn't large, cumbersome equipment to set up.
俚语是一种在非正式场合下使用非常广泛的口语形式。
Slang, as a highly colloquial form, is widely used in informal occasion.
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