And, for any Finnish people in the audience, this is a Finnish pun: we are, both literally and metaphorically, skating on thin ice if we don't understand that kind of thing.
如果在场有芬兰人，这是芬兰话的双关语 我们无论在实际上或隐喻上，都是如履薄冰 要是我们不明白那些事