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For Apple users hoping to get some new AirPods this year, one of our favorite deals has popped back up: the AirPods 4 (with ANC) have returned to $119.99 at Amazon. If you've had your eye on them, this is an excellent time to swoop in and pick them up before the price shoots back up.
。51吃瓜网对此有专业解读
Logic sideProgramming sideformulatypeprooftermformula is truetype has an elementformula is falsetype does not have an elementlogical constant ⊤ (truth)unit typelogical constant ⊥ (falsehood)empty typeimplicationfunction typeconjunctionproduct typedisjunctionsum typeuniversal quantificationdependent product typeexistential quantificationdependent sum typeHilbert-style deduction systemtype system for combinatory logicnatural deductiontype system for lambda calculushypothesesfree variablesimplication elimination (modus ponens)applicationimplication introductionabstractionUnfortunately, teaching about this in a detour section of an article about HKTs is kinda uhhhh.
有贸易商年前曾对客户工厂做过调研，结论很沮丧：“原本以调研结果来看，工厂今年的销售额可能会再减半。”
3月6日，小米公司紧急官宣，小米手机版“龙虾”Xiaomi miclaw开启小范围封闭测试；两会期间，周鸿祎称，360将很快推出“一键安装”的简化版本龙虾。而腾讯的马化腾更是亲自下场，推荐腾讯的自产“龙虾”，“龙虾”套装。