This would free them to transact business across state lines.

这会使他们自由地跨越州界进行商业交易。

《柯林斯英汉双解大词典》

Transact business—Users can get a quote for new insurance policies and make an endorsement to a policy.

交易业务 - 用户可以收到新保险条例的报价，并且可以背书采用条例

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The infrastructure we use to produce our energy, transport our goods, and transact our business is under stress.

我们用来生产能源、运输货物、办理生意的基础设施正面临着压力。

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"The court may transact any business at a special session outside the circuit that it might transact at a regular session, " according to the law.

CNN: Courts face unique challenges

Bitcoin offers privacy and, perhaps most important, an easy way to transact business across borders.

WSJ: The Weekend Interview With Gavin Andresen: Bitcoin vs. Ben Bernanke

At the same time the Internet offers a splendid new medium through which to transact business.

ECONOMIST: From dot.com to dot.bomb