Such transactions are prohibited by U. S. law.
美国法律禁止此类汇款业务。
For most transactions, such a level of detail is not necessary.
对大多数交易来说，没有必要做这么细。
Concurrency control of transactions is the emphasis of such study.
而事务的并发控制，则是研究的重点。
Concurrency control of transactions is the emphasis of such study.
而事务的并发控制，则是研究的重点。
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