although /ɑlˈðoʊ/ conjunction Learner's definition of ALTHOUGH
1
: despite the fact that : though —
used to introduce a fact that makes another fact unusual or surprising虽然，尽管（用于引出一件事情，以突显另一件事情不同寻常或不可思议） -
Although [=while, even though] he was hungry, he could not eat.尽管很饿，他却不能吃。
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Although we rarely see each other, we're still very good friends. = We're still very good friends although we rarely see each other.尽管我们彼此很少见面，但我们仍是好朋友。
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Although [=while] I'd love to have dinner with you tonight, I already have plans.尽管我今晚很想和你共进晚餐，但我已经有安排了。
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It feels as if I've known you forever although [=even though] we've only known each other for a day.尽管我们刚认识一天，但我却感觉我们似乎已经相识很久了。
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He's the basketball team's best player although he's the shortest one on the team.尽管他是篮球队里最矮的球员，他却是最棒的。
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Although (it is) small, the apartment is very expensive.公寓虽小却很贵。
2
: but, however, though —
used when making a statement that differs from or contrasts with a statement you have just made但是，然而（用于表示转折或对照） -
I don't believe we've met before, although I must say you do look very familiar.我想我们以前没见过面，但我得说你看上去确实很面熟。
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I think his name is John, although I'm not completely sure about that.我认为他名叫约翰，但我并不十分肯定。
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I'd love to have dinner with you, although I can't.我很想和你共进晚餐，但我不能。
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The book had a good, although not great, plot.这本书的情节还不错，但算不上非常好。