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1·Both regimes are setting long-term targets, sending a market signal well beyond 2012 as they both acknowledge a need for market-based mechanisms.

这两个交易体系正在制定长期目标，传递出一个2012年后的市场信号，而且他们也都承认需要有市场机制。

2·Apple will undoubtedly acknowledge that holding the iPhone 4 does affect the signal.

毫无疑问，苹果将会承认手握iphone4的确会影响到信号。

3·In this case, the receiver of the request subaction generates a 'pending acknowledge' to signal the requester node that the message has been well received, and that a response subaction will follow.

这样，请求子处理的接收者生成一个“未决回应”通知请求节点消息已经收到，随后跟一个响应子处理。