以太坊ever

『壹』 在英语中that的意思有多少种，有什么用处

that 1
/ ðæt; ðæt/ det (pl those / ðəuz; ðoz/)
(used to make a person or thing specific, esp when he/it is seen as distant in space or time from the speaker/writer 用以指人或事物, 尤指在空间或时间上较远的): Look at that man standing there. 瞧站在那儿的那个男子. * That box is bigger than this. 那个盒子比这个大. * How much are those apples at the back? 后边那些苹果多少钱? * Where did that noise come from? 那响声从哪儿来的? * Have you read that book about China? 你读过那本关於中国的书吗? * I was still living with my parents at that time/in those days, ie at that particular time in the past. 我那时还跟父母住在一起. Cf 参看 this.
(a) (used to specify a person or thing that is indicated or mentioned 用以指要表明的或要提及的人或事物): Did you see that boy? 你看见那个男孩儿了吗? * He began by writing a thriller. That book sold a million copies. 他是写惊险小说起家的. 那本书卖了一百万册. (b) (used with a n followed by a possessive 与名词连用, 后接物主代词): Did you meet that friend of his? 你见过他的那个朋友吗? * That dress of hers is too short. 她那件连衣裙太短了.
(used in front of the antecedent of a relative clause 用於关系从句的先行词前): Have you forgotten about that money I lent you last week? 你忘了上星期我借给你的钱了吧? * Those students who failed the exam will have to take it again. 考试不及格的学生需补考. * Who was that man you were talking to? 刚才你正和一个人说话, 他是谁?
> that adv to that degree; so 达到那样的程度; 如此; 这般: I can't walk that far, ie as far as that. 我可走不了那麽远. * They've spent that much, ie as much as is indicated. 他们花了那些钱. * It's about that long, ie as long as that. 那个东西大约有那麽长. * It isn't all thatcold, ie not as cold as you are suggesting or not extremelycold. 还没冷到那种程度（不像你说的那麽冷或极冷）. that 2
/ ðæt; ðæt/ pron (pl those / ðəuz; ðoz/)
(a) (used to make a thing specific, esp one more distant in space or time than another 用以表示所指的事物, 尤指在空间或时间上较另一事物远的): Those look juicier than these. 那些显得比这些汁液多. * That's a nice hat. 那顶帽子很好. (b) (referring to people, only with the verb be 用以指人, 只能与动词be连用): That's Peter at the bus-stop. 在公共汽车站那儿的那个人是彼得. * Who's that? 那是谁?
(used to specify a thing, an event, an idea, etc that is indicated or mentioned 用以指要表明的或要提及的事物、 想法等): Look at that! 看那个! * Do you remember going to Norway? That was a good holiday. 你还记得去挪威的情景吗? 那个假期真好. * Send her some flowers that's the easiest thing to do. 给她送些花儿去--那是最好办的事.
(used as the antecedent of a relative clause 用作关系从句的先行词): Is that what you really think? 你真的那样想吗? * That's what he told me. 他就是那麽跟我说的. * Those who expect the worst are less likely to be disappointed. 把事情想得坏的人, 不容易失望. * Those present were in favour of a change. 出席的人都赞成改一改. * There are those who say (ie Some people say) she should never have been appointed. 有人说根本就不应该委派她.
(idm 习语) `that is (to say) (a) which means 就是; 即: He's a local government administrator, that is to say a Civil Servant. 他是地方行政官员, 也就是说是文官. (b) to be specific 确切地: She's a housewife when she's not teaching English, that is. 她是个家庭主妇--是指她不教英语的时候. ,that's `that (used to indicate the end of a discussion, search, development, etc 用以表示谈论、 调查、 进展等的结束): I take it that's that we've heard your final offer? 我看就这样了--我们已经了解到你们出的最高价了吧? * So that's that. At last we're all agreed. 就这样了. 我们终於取得了一致的意见. that 3
/ ðət; ðət; rare strong form ç½ǖï¹ū 强读å¼ǒ ðt; ðæt/ conj
(used to introce a clause that is the subject or object of a v 用以引导主语从句或宾语从句): That the attempt to save her had failed soon became widely known. 想救她而未救成, 此事不久已尽人皆知. * She said that the book was based on a true story. 她说那本书取材於一件真事. * I thought that 13 May would be the date of the election. 我以为5月13日是选举的日子. * It's possible that he hasn't received the letter. 可能他还没收到那封信呢.
(rhet 修辞) (used to express wishes and regrets 用以表示愿望和遗憾): Oh that I could see him again! 我真希望能再见到他! * That I should see a child of mine arrested for selling drugs! 我竟然看见自己的孩子因贩毒而被捕! that 4
/ ðət; ðət; rare strong form ç½ǖï¹ū 强读å¼ǒ ðt; ðæt/ rel pron 关系代词
(used to introce a defining clause after a n, esp referring to things 用以引导名词之后的限定从句, 尤指表示事物的) (a) (as the subject of the v in the clause 在从句中作主语): The letter that came this morning is from my father. 今天早晨收到的那封信是我父亲寄来的. * The clothes that are on the floor are dirty. 地板上的那些衣物是脏的. * The woman that spoke to me in the shop used to live next door. 在商店里跟我说话的那个女人从前就住隔壁. * Who was it that won the World Cup in 1982? 谁赢得了1982年的世界杯? (b) (as the object of the v in the clause, but usu omitted in this position 在从句中作宾语, 但通常省略此字): The watch (that) you gave me keeps perfect time. 你给我的那个表走得很准. * Here are the books (that) I borrowed from you a week ago. 这些是我一周前向你借的书. * The person (that) I have to phone lives in India. 我要打电话找的那个人住在印度. (c) (as the object of a prep in the clause, but usu omitted in this position 在从句中作介词宾语, 但通常省略此字): The photographs (that) you're looking at were taken by my brother. 你看的那些相片是我哥哥拍的. * The man (that) I was talking to had just arrived from Canada. 我与之谈话的那个人刚从加拿大来. * These are the children (that) I looked after last summer. 这都是去年夏天我照看的孩子.
(used to introce a clause following superlatives, the only, all, etc 用以引导形容词最高级以及the only、 all等之后的从句): Shakespeare is the greatest English writer that ever lived. 莎士比亚是有史以来最伟大的英国作家. * This is the most expensive watch (that) I've ever owned. 在我所有的表当中, 这个最贵. * The only part of the meal (that) I really liked was the dessert. 这顿饭只有甜食是我爱吃的. * All that I have is yours. 凡我所有都是你的.
(used after an expression of time instead of when 用於表示时间的词语之后, 代替when): the year that my father died 我父亲去世的那年 * the day that war broke out 战争爆发的那天.

出自牛津第六版

其实记两种就好：一种是指示代词，意思是“那个”
eg：that boy 那个男孩

另一种就是在从句中，定语从句中的关系代词，强调句中的标志之一“It is/was... that”

『贰』 LINK, ChainLink是什么

LINK

1.简介

LINK是基于以太坊区块链的ERC20标准化代币，用于支付Chainlink节点运营商，以便从脱链数据中检索数据，将数据格式化为区块链可读格式，脱链计算以及保证正常运行时间。Chainlink代币作为运行节点的一部分，可防止不良参与者。

2.项目介绍

首个分散的 Oracle 网络，允许任何人安全地提供智能合同，访问关键的外部数据，脱机支付和任何其他 API 功能。任何拥有数据 feed、脱机服务（如本地付款）或任何其他 API 的用户均可以直接将其提供给智能合同，以换取 LINK 令牌。ChainLink网络是ChainLink节点的分布式网络，它们都直接将特定数据、API和各种离线支付功能的使用输送给智能合约。Chainlink网络由两个独立的部分组成，链上链和外链，它们必须交互以提供服务。该网络的构建方式使其可以升级，因此可以在更好的技术和技术出现时替换其不同的组件。网络的链上组件通过服务级别协议（SLA）基于智能合约的一方请求的度量来过滤神谕。使用这些指标，Chainlink收集对SLA查询的响应，使用声誉和聚合模型对它们进行排序，并提供可能实施到智能合约中的Chainlink查询的最终集合结果。网络的链外组件由连接到以太坊网络的Oracle节点组成，这些网络独立收集对离线请求的响应。这些脱链节点可以位于任何行业内，例如纽约证券交易所运营的脱链节点可以为Chainlink网络提供实时准确的交易信息，或者Visa网络脱链节点可以解决交易通过Chainlink网络与消费者和供应商进行交互。Chainlink技术旨在将来自所有这些行业的节点集成到一个通用网络中，该网络本身充当（低成本）中间人，根据需要解释并正确分配数据。Chainlink系统将确保从神谕中得到的结果是准确的，并且允许神谕与他们提供的数据保持独立。任何数据，付款，电子签名或其他API提供商以及个人开发人员都可以通过将他们熟悉的API连接到网络，轻松加入Chainlink网络。一旦API连接到ChainLink，用户就成为ChainLink节点操作员，并负责将该API连接到ChainLink网络。为了激励运营商提供API信息，他们在LINK令牌中得到了补偿，以便成功完成在线链接请求。该项目目前提供了一个完全分布式的与比特币，以太坊和Hyperledger兼容的神谕网络。预计未来将支持其他区块链，这将允许智能合约与任何其他公共或私有连锁之间的跨链连接，允许世界上的任何人使用Chainlink网络，无论其平台如何。所有服务提供商都将能够安全地提供智能合同，以访问关键的外部数据，甚至可能还有非连锁支付。

3.评述

Chainlink（LINK）是一个分散的网络，可为智能合约提供信息（oracle）。 Chainlink由谢尔盖·纳扎罗夫（Sergey Nazarov）和史蒂夫·埃利斯（Steve Ellis）于2017年成立，旨在通过智能合约为其执行参数解决链下信息采购问题。智能合约被设计为在满足某些参数时自动执行，但是，当这些参数在链下存在时，则依赖于信息源（称为oracle）来提供必要的信息。脱链预言者往往是集中的，并且依赖于第三方以可信赖且时间紧迫的方式提供关键信息。 ChainLink旨在通过分散的预言网络将信息提供给智能合约，从而打破这种依赖性，这些预言在Link区块链上协同工作，以验证并将关键信息转发给这些合约。 ChainLink网络允许拥有数据馈送或信息承载API的用户轻松地向智能合约提供信息，以换取LINK令牌。大事记2017年9月-ChainLink ICO。2018年11月-收购Town Crier（智能合约和数据隐私项目）。2019年6月13日-宣布与Google合作效用链接网络通过Oracle的分散网络（数据源和API）向智能合约提供及时，准确的信息。该信息对于有效和准确地执行智能合约至关重要，因为所需信息存在于链下，并且必须有一种可靠的方法来获取链上信息。 LINK令牌用作使用Link Network提供的数据的智能合约的付款，其中提供准确信息的预言机将按所占LINK的比例进行奖励。重要功能与SWIFT和Google等主要行业参与者的合作伙伴关系以太坊侧链的整合，例如Harmony，Celer和Matic。平均区块时间n / a；总供应量10亿LINK;通过阈值签名将Oracle Consensus写入以太坊区块链。

相关链接：https://chain.link/

https://en.bitcoinwiki.org/wiki/ChainLink

https://everipedia.org/wiki/lang_en/chainlink-cryptocurrency

https://blog.chain.link/threshold-signatures-in-chainlink/

https://blockonomi.com/chainlink-guide/