Descending into the windowless basement of a second world war air-raid bunker built for civilians in central Berlin is arguably an eerie enough evocation of what it means to endure life in a conflict.
When I was talking about the power of smell on the radio, Speth, a Welsh speaker from Manchester, got in touch to say that in Welsh you can hear a smell as well as smell it. At first this sounded charming, if far-fetched. But the more I thought about it, the more sense it made. While I can’t – in English, anyway – exactly hear the smell of that Black Country bike shop in 1977, I can smell, hear and see it very clearly. I can feel it too. I can feel the shop man’s grip as he lifts me into the saddle. And I can hear him saying to my grandad: “Blimey, he’s a lump, isn’t he?” Ever sensitive about my weight, that was a sour note. But I’ll let it pass, because all I can feel, then and now, is the general joy.
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There is a special form for boolean formulas called "Conjunctive Normal Form" (CNF). A problem in this form consists of clauses connected with and operators, where each clause only contains variables connected with or operators. The variables can appear negated, but only variables can be directly negated, something like !(a && b) is not allowed. An example boolean formula in CNF form is:
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From Squid Game to Blackpink, how South Korea became a culture powerhouse
Credit: Netflix。关于这个话题，旺商聊官方下载提供了深入分析