n.叶；风向标；瞄准板；反复无常的人adj.变化不定的，反复无常的； 变形： 复数：vanes 英英释义： vane[ vein ]n.flat surface that rotates and pushes against air or water同义词：blademechanical device attached to an elevated structure; rotates freely to show the direction of the wind同义词：weathervaneweath