control surface

相關句子：

1. A variable control surface on the trailing edge of an aircraft wing, used primarily to increase lift or drag.
   襟翼飛機後翼上最初用來增加上升力或拖力的可靈活控制的輔助翼

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英文解釋：

名詞 control surface:

1. a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight
   同義詞：airfoil, aerofoil, surface