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老家使用液化气和双眼 #燃气灶 做饭，但是老妈有时：
- 没关灶具的按压旋钮
- 只关液化气罐的阀门
假设上次没关左灶，这次使用右灶。打开阀门后，左灶就会漏气，非常危险。于是写了一个警示语提醒老妈记得关闭所有开关。
BY 叨庭涂说
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What Is Bitcoin?
Bitcoin is a decentralized digital currency that you can buy, sell and exchange directly, without an intermediary like a bank. Bitcoin’s creator, Satoshi Nakamoto, originally described the need for “an electronic payment system based on cryptographic proof instead of trust.” Each and every Bitcoin transaction that’s ever been made exists on a public ledger accessible to everyone, making transactions hard to reverse and difficult to fake. That’s by design: Core to their decentralized nature, Bitcoins aren’t backed by the government or any issuing institution, and there’s nothing to guarantee their value besides the proof baked in the heart of the system. “The reason why it’s worth money is simply because we, as people, decided it has value—same as gold,” says Anton Mozgovoy, co-founder & CEO of digital financial service company Holyheld.
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