单词：chain block with steel structure
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What if you could wave your phone over a piece of fish at a store and immediately see a record of its path through the supply chain? 如果你在商店里把手机在一块鱼肉上面晃一下，就能立即看到它在供应链上的路径记录，结
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Unit five [00:49.61]Where have you been? [00:52.95]Yesterday Annie got home late.She had a meeting with hte Busy Bees. [01:01.20]Her mother was very angry.'Look at the time, Annie!'She said. [01:09.67]'It's half past seven. Where have you been?''I've
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By now, most people have heard of bitcoin. Bitcoin is a virtual currency that has had a huge rise in value during 2017. Bitcoin however is just one of many cryptocurrencies. A cryptocurrency is a kind of money that does not exist in the form of bills
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AUDIE CORNISH, HOST: When you hear the word blockchain, you might think of cryptocurrency. The technology acts as a digital ledger which has the potential to transform a number of industries like agriculture. Kamila Kudelska of Wyoming Public Radio e
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