In the real world, there are always transaction costs.
在真实世界中，总是有交易成本的。
One advantage of the web is that transaction costs are low.
网上交易的好处之一是成本低。
In the real world, there are always (or almost always) transaction costs.
在真实世界中，总是(或通常总是)有交易成本的。
It therefore is crucial to keep transaction costs to a minimum when following it.
这样，交易成本的控制就成为了一个重要问题。
However, this is not pure transaction costs, they should be called the system cost.
不过，这不是纯粹的交易成本，他们应该被称为系统的成本费用。
The construction contract cost is composed of contract price and transaction costs.
工程合同造价由合同价格和交易成本两部分组成。
As much as the registration authority will undoubtedly increase transaction costs for the parties;
登记机关之多，无疑增加了当事人的交易成本；
The upshot is that so long as competition exists, transaction/institution costs must also exist.
结论是：只要竞争存在，交易或制度费用一定存在。
One word of warning, the zero-transaction-costs assumption is just an assumption.
提醒一句，“零交易成本”假设仅仅是一个假设。
One word of warning, the zero-transaction-costs assumption is just an assumption.
提醒一句，“零交易成本”假设仅仅是一个假设。
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