1. center n.中心‭ ‬
    central adj.中心的,中央的
    CPU = central processing unit
    eccentric adj. (人、行為等)古怪的, 反常的
    decentralized 去中心化的支付系統。不依靠特定貨幣機構發行
  2. 去中心化,這是比特幣最大的特點。互聯網提供的技術支持,使得虛擬貨幣的製造和發行再也不需要一個類似於美聯儲的貨幣主管機構。使用者運行Bitcoin這個軟體,組成一個P2P網路。比特幣就在網路上產生,接著,你可以進行轉賬和其他交易。所有的這些操作,都不需要你的名字。
  3. author n.作者
    authority n.權威
    authorities concerned 有關當局
    v. 授權給,全權委託
  4. transaction n.交易;業務;買賣
  5. reverse adj.相反的 v.顛倒,翻轉
    reversal n. 翻轉
    irreversible adj. 不可逆的;不能翻轉的;不能取消的;不能倒置的
  6. reputation n.名譽,名聲 +for (= fame)
  7. valid adj.有根據的;確鑿的;令人信服的
    validity n.正當;正確
  8. reveal v.顯示;透露
    revelation n. .顯示;透露;啟示錄
  9. novel adj. 新奇的 (= new)
    innovation n.革新,改革,創新
  10. convert n.皈依者
    convert to
    v. 1.轉換 2.使~改變信仰
    n. 有活動摺篷的汽車


About the only thing you can't do is ignore them. Because they change things.
John Appleseed

Bitcoin is an experimental, decentralized1 digital currency that enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer2 technology to operate with no central authority3; that is, managing transactions4 and issuing money are carried out collectively through the network.
Any transaction issued with Bitcoin cannot be reversed5; it can only be refunded by the person receiving the funds. That means you should do business with people and organizations you know and trust, or who have an established reputation6. Bitcoin can detect typos and usually wont let you send money to an invalid 7address by mistake.
All Bitcoin transactions are stored publicly and permanently on the network, which means anyone can see the balance and transactions of any Bitcoin address. However, the identity of the user behind an address remains unknown until information is revealed8 during a purchase or in other circumstances.
The price of a bitcoin can unpredictably increase or decrease over a short period of time due to its young economy, novel9 nature, and sometimes illiquid markets. Consequently, keeping your savings with Bitcoin is not recommended at this point. Bitcoin should be seen like a high risk asset, and you should never store money that you cannot afford to lose with Bitcoin. If you receive payments with Bitcoin, many service providers can convert10 them to your local currency.

Bitcoin is an experimental new currency that is in active development. Although it becomes less experimental as usage grows, you should keep in mind that Bitcoin is a new invention that is exploring ideas that have never been attempted before. As such, its future cannot be predicted by anyone.

44. What is the purpose of this article?
(A) To introduce a new currency.
(B) To prove the value of a young economy.
(C) To explore ways to do online transactions.
(D) To explain how to build up a business network.

45. Why is the value of Bitcoin not stable?
(A) Because its use is illegal.
(B) Because it is not a valid investment.
(C) Because it is still developing.
(D) Because its circulation is limited to the youth.

46.Which of the following is true about Bitcoin?
(A) Bitcoin addresses are known only to their owners.
(B) Once a transaction is made, the Bitcoin cannot be refunded. (C) Bitcoin users identity is always open to the general public.
(D) When a payment is received, the Bitcoin can be turned into local currency.

47. What advice would the author give to those who are interested in keeping money in Bitcoin?
(A) Better late than never.
(B) Look before you leap.
(C) Make hay while the sun shines.
(D) No pain, no gain.
比特幣的特點 「Click me」