must handle many clients simultaneously 必须同时处理多个请求 must do this as fast as possible 必须尽可能快的处理 ..
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必须同时处理多个请求
Multiple requests must be processed simultaneously
以上为机器翻译结果，长、整句建议使用 人工翻译 。
如果对一个帐户同时处理多个请求，则必须隔离这些请求，以便一次只能有一个事务影响该帐户。
If multiple requests are processed against an account at the same time, they must be isolated so that only a single transaction can affect the account at one time.
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