（Liquid属于私链） 另外，Liquid的部分隐私功能是通过使用“保密交易”（confidential transactions）实现的。保密交易是由Blockstream开发者推出的一项技术。
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客户难以理解这些交易的结构，也更难以对交易价格提出异议，因为它们通常受到保密协议的保护。
It is difficult for clients to understand the make-up of these trades and still harder to challenge prices since they are often protected by confidentiality agreements.
赫德与惠普公司分离交易不包括非竞争条款，这通常在加州不能强制执行，但交易条款包括2年的保密协议。
Hurd's separation deal with HP did not include a non-compete provision, which is generally unenforceable in California, but did include a 2-year confidentiality pact.
保密是衍生产品交易的一个关键因素，它可以使银行获得巨大的利润。
The secrecy surrounding derivatives trading is a key factor enabling banks to make such large profits.
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