The system is capable of the concept hierarchy knowledge representation for various domain-knowledge and of making transaction table.

该系统具备多种领域知识的概念分层表示功能、事务表编制功能，实现了知识发现的基本功能。

But technology has reduced transaction costs, making sharing assets cheaper and easier than ever-and therefore possible on a much larger scale.

但是，技术已经降低了交易成本，使得共享资产比以往更便宜、更容易——因此，在更大的范围内共享资产是可能的。

In this case GENERATE_UNIQUE cannot guarantee a unique return value for each transaction, making it not suitable for a high-volume transaction system.

在这种情况下，GENERATE_UNIQUE不能为每个事务生成一个惟一的返回值，因而这种方法不适合有大量事务的系统。

It can’t handle micropayments, and transaction fees occur during every exchange (moreso if making international payments).

它不能处理小额支付，并且每一次兑换都会产生交易费用[国际性支付更多]。

And last March, Apple gave iTunes developers the ability to charge subscription fees through their applications, making iTunes the gateway for an entirely new breed of transaction.

去年三月，苹果公司(Apple)授权itunes开发商通过他们的应用程序收取订阅费，这为iTunes创造了一种全新的交易方式。