n.不屈不挠，坚定不移，恒久不变的状态或性质；持续性；稳定性；持久性 英英释义： constancy[ 'kɔnstənsi ]n.the quality of being enduring and free from change or variation"early mariners relied on the constancy of the trade winds"同义词：stability(psychology) the tendency for perceived objects to giv