Greenfield project:
In many disciplines a greenfield is a project that lacks any constraints imposed by prior work.
en.wikipedia.org
绿地模式:
绿地模式（Greenfield，又譯為綠燈區模式）是用于无线网络IEEE802.11n通訊協定中的一种提高传输速率的模式。
zh.wikipedia.org
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Greenfield project绿地模式