Taken the cut-in and cut-off wind speed of wind turbine into account, a concept named active wind power density was presented.

通过对风功率密度进行分析，考虑到风机工作风速区间，提出有功风功率密度概念。

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The resort recently added a casino (for guests and members only) that was virtually empty when we visited, but the Greenbrier is better served by promoting the breadth and quality of its more active pursuits: The falconry lesson was incredibly detailed, and my tennis instructor had me sucking wind ten minutes into a hitting session.

FORBES: Head 2 Head