n.易变；不定性；不忠实
Constancy in love is perpetual inconstancy, inasmuch as the heart is drawn to one quality after another in the beloved, now preferring this, now that. 爱所恒定不变的是它永恒的易变，因为心被心爱人一个接着一个的特质所吸引，一会儿更喜欢这个，一会儿又更喜欢那个。
