(informal)used before a statement or suggestion to point out that it is serious, however facetious or strange it may seem
(非正式)［用于陈述或建议前，表示尽管该陈述或建议可能看似俏皮或奇怪但却是当真的］我不是在开玩笑，但——
I'm not being funny but I haven't got all day.
我不是开玩笑，但我没有整天的时间。
appreciate the humorous aspect of a situation or experience
看到（某事）幽默的一面
(informal)used ironically to indicate that a speaker does not share another's joke or amusement
(非正式)［反话，用于表示不欣赏听到的笑话或趣事］喔，真好笑！
‘D'yeh want a celery choc ice?’ ‘Very funny, I don't think.’.
“你要来一个芹菜巧克力冰淇淋吗？”“太好笑了，我不要。”。