This content is being provided to you for informational purposes only. The content has been prepared by third parties not affiliated with Coinbase Inc or any of its affiliates and Coinbase is not responsible for its content. This content and any information contained therein, does not constitute a recommendation by Coinbase to buy, sell or hold any security, financial product or instrument referenced in the content.

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Bitcoin (BTC) is the world’s first decentralized digital currency and payment system and is by far the most known and valuable cryptocurrency. It was created in 2009 by an anonymous person or group called Satoshi Nakamoto. Bitcoin enables transactions to be sent peer-to-peer without passing through a central authority. The transactions are recorded on a decentralized public ledger called the blockchain and each payment acquires a small transaction fee to cover the cost of the network. The total supply of Bitcoin is 21 million and it’s smallest unit of bitcoin is called a Satoshi, it’s a hundred millionth of a bitcoin – 0.00000001 BTC. The creation of Bitcoin’s is happening through mining. Miners have the task to validate transactions and keep the network secure. Their efforts are rewarded by new minted Bitcoins and transactions fees. Bitcoin can be exchanged for fiat or other cryptocurrencies, products and services. Over 100,000 merchants and vendors accepts bitcoin as a payment.

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Bitcoin is the world’s first virtual digital currency underpinned by a completely decentralized blockchain technology also known as the Distributed Ledger Technology (DLT). Bitcoin was first created in 2009 by an anonymous identity of Satoshi Nakamoto. Bitcoin allows for peer-to-peer transactions and is completely free of any third-party involvement like financial institutions or central banks. The Bitcoin’s blockchain network maintains a history of all the transactions made and facilitates instant funds transfer with minimal transaction fees required to cover the cost of network operation. The total supply of Bitcoin is fixed at 21 million coins and its smallest fractional unit is called as Satoshi. Each Satoshi is a hundred millionth of a Bitcoin which means 100,000,000 Santoshi = 1 BTC. Bitcoins are generated by a process known as ‘mining’ which involves solving of complex mathematical algorithms. The miners involved in the mining process look after the Bitcoin network security and validate each transactions taking place on the network. Bitcoin can be exchanged with other digital currencies or fiat currencies. Bitcoin is used as a means of payment by over 100,000 vendors and merchants.

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Bitcoin Cash was launched in August 2017, as a direct response to small block sizes on the Bitcoin code. 1MB block sizes were not meeting the demand of the growing community, so a group of dissatisfied crypto enthusiasts decided to create a ‘hard fork’ of the Bitcoin blockchain, with an increased 8MB block size. No one person currently takes credit for the token’s creation; rather it is attributed to a de-centralized group of developers.

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EDA adjustments caused instabilities in mining difficulty of the Bitcoin Cash system, resulting in Bitcoin Cash being thousands of blocks ahead of Bitcoin. To address the problem with stability, a change of the Bitcoin Cash DAA was implemented and the EDA cancelled. The change took effect on 13 November 2017. After the change, the Bitcoin Cash DAA adjusts the mining difficulty after each block. To calculate the difficulty for a new block, the Bitcoin Cash DAA uses a moving window of last 144 blocks.[36]

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在古代,加密是由许多办法完成的。在中国较“流行”使用淀粉水在纸上写字,再浸泡在碘水中使字浮现出来。而外国就不同了,最经典的莫过于伯罗奔尼撒战争。公元前405年,雅典和斯巴达之间的伯罗奔尼撒战争已进入尾声。斯巴达军队逐渐占据了优势地位,准备对雅典发动最后一击。这时,原来站在斯巴达一边的波斯帝国突然改变态度,停止了对斯巴达的援助,意图是使雅典和斯巴达在持续的战争中两败俱伤,以便从中渔利。在这种情况下,斯巴达急需摸清波斯帝国的具体行动计划,以便采取新的战略方针。正在这时,斯巴达军队捕获了一名从波斯帝国回雅典送信的雅典信使。斯巴达士兵仔细搜查这名信使,可搜查了好大一阵,除了从他身上搜出一条布满杂乱无章的希腊字母的普通腰带外,别无他获。情报究竟藏在什么地方呢?斯巴达军队统帅莱桑德把注意力集中到了那条腰带上,情报一定就在那些杂乱的字母之中。他反复琢磨研究这些天书似的文字,把腰带上的字母用各种方法重新排列组合,怎么也解不出来。最后,莱桑德失去了信心,他一边摆弄着那条腰带,一边思考着弄到情报的其他途径。当他无意中把腰带呈螺旋形缠绕在手中的剑鞘上时,奇迹出现了。原来腰带上那些杂乱无章的字母,竟组成了一段文字。这便是雅典间谍送回的一份情报,它告诉雅典,波斯军队准备在斯巴达军队发起最后攻击时,突然对斯巴达军队进行袭击。斯巴达军队根据这份情报马上改变了作战计划,先以迅雷不及掩耳之势攻击毫无防备的波斯军队,并一举将它击溃,解除了后顾之忧。随后,斯巴达军队回师征伐雅典,终于取得了战争的最后胜利。

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  而 Jamal 是个不折不扣的理想主义者。他善良而执着,对 Latika 一直不肯放弃。 Salim 在火车上数钱的时候, Jamal 脑子里想的都是 Latika ,兄弟俩的人生观一目了然。演员 Dev Patel 现实中也是只有 18 岁,有人说 Jamal 看起来太单薄,跳起舞来都是长手长脚的。但是这有什么关系呢?外型虽然薄弱,意志却无比坚强。 开头被拷打时,胖警察报告审了他一夜,除了名字什么都没问出来——“ He’s a tough guy.” 他的长官说“ What the hell can a slumdog possibly know” 的时候,背后被电晕的 Jamal 吐了一口血:“ The answers.” 这个镜头,我印象非常深刻。 18 岁的 Jamal Malik 因为这种坚强而显得格外性感。如果说这部电影是个童话,那也一定是因为 Jamal 这种近似不可能的执着和坚持,而不是男女主人公的离奇爱情故事。选不出“ Truth Alone Triumphs.” 的 Jamal ,他的人生故事却是这句话的完美诠释。 如果 Salim 是那个社会的代表型人物, Jamal 就是印度人民的精神象征,这就解释了为什么 Jamal 的天真善良和理想主义是理所当然的,也解释了为什么 Jamal 赢大奖后人们都为他兴奋欢呼。

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许多看完电影的人说,这是一部讲述贫民窟少年贾马尔爱情的电影,就连导演也说他要表现穷人勇敢的爱情;但我并不这么认为。原因是,爱情在这部电影里只是起到了两个作用,一个是贯穿整个故事的结构线索,正是依靠贾马尔对拉提卡的相思之情来结构故事,才把一个个支离破碎的流水账似故事片段串成了一个艺术整体。爱情更是主人公贾马尔永不放弃,最终选择参加“谁想成为百万富翁”节目的动机,它把故事推向了前进。二是作为一个没有受过什么正规教育、甚至不认得几个字的贫穷青年,贾马尔对爱情的执着,就代表着他对生命的执着,而爱情,在这里是一切美好的代名词,是主人公对自己所有人生理想的寄托。之所以这么说,并非臆想出的结果,我们可以反观整部电影的人物构成,我们可以说贾马尔是怎样怎样的性格,他哥哥萨利姆如何如何的人物,可考虑到拉提卡时,我们却没有什么特定的印象,她的人物性格并不鲜明,只能模糊地说,她善良,美丽,深爱着贾马尔,其他的一切比较细微的特别之处,我们似乎并不能说出来。原因很简单,就是因为编剧在塑造这个人物形象的时候,就没有投入浓墨重彩,这就导致了拉提卡这个全片的女主人公虽然出场次数很多,可是并不是影片的重心所在,以至于她的形象比较类型化,是个美好意象而已,不是非常立体的人物。
The split originated from what was described as a "civil war" in two competing bitcoin cash camps.[18][29] The first camp, supported by entrepreneur Roger Ver and Jihan Wu of Bitmain, promoted the software entitled Bitcoin ABC (short for Adjustable Blocksize Cap) which would maintain the block size at 32MB.[29] The second camp led by Craig Steven Wright and billionaire Calvin Ayre put forth a competing software version Bitcoin SV, short for "Bitcoin Satoshi's Vision," that would increase the block size limit to 128MB.[26][29]

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This content is being provided to you for informational purposes only. The content has been prepared by third parties not affiliated with Coinbase Inc or any of its affiliates and Coinbase is not responsible for its content. This content and any information contained therein, does not constitute a recommendation by Coinbase to buy, sell or hold any security, financial product or instrument referenced in the content.

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