Ion exchange fibre is a newly developed ion exchange agent.

离子交换纤维是一种新型的高效的离子交换剂。

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Using an instant messaging client as a friendlier interface into database systems, where one of the parties in the exchange is a database agent rather than a human, is yet another possibility.

另一种可能性是使用即时消息传递客户机作为更友好的数据库系统界面，在这种系统中，参与信息交换的一方是数据库代理，而不是人。

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Just as they shop around to find the best estate agent, they can seek out low-charging vehicles such as exchange-traded funds.

正如他们寻找最好的房产经纪人那样货比三家，他们可以选择交易所基金等收费低的工具。

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The FBI agent agreed to the exchange, according to the complaint, and Mr. Hicks sent the agent five credit-card numbers three days later.

WSJ: Arrests Made in Massive Online Sting Operation

One of the spirited differences of opinion to date has to be the exchange between McCarver and free agent to be catcher A.J.

FORBES: Disappointing Television Ratings are a Legitimate Concern for Major League Baseball

Upon calling them again I was told that this was standard procedure in the event of faulty goods and no refund or exchange could go ahead without this visit, despite a previous agent telling me that the pictorial evidence was sufficient to effect this action.

BBC: Fergus Muirhead