n.持久不变，稳定性，忠贞，始终如一，忠诚，忠实

The constancy of the sunrise is a symbol of hope and new beginnings.
日出的恒常性象征着希望和新的开始。
She maintained a constancy in her work ethic, never skipping a day.
她保持着工作的恒定，从不缺勤。
His patience and constancy during the long journey were commendable.
他在长途旅行中的耐心和恒心值得赞扬。
The constancy of the moon's phases can be observed and predicted with ease.
月亮的盈亏周期可以轻易地观察和预测。
Scientific laws exhibit an unchanging constancy that we can rely on.
科学定律表现出恒久不变的特性，我们可以信赖。
The constancy of his devotion to his family is truly inspiring.
他对家庭的忠诚始终如一，实在令人感动。
Her constancy in pursuing her dreams led to ultimate success.
她在追求梦想上的坚持最终带来了成功。
The constancy of the tides is a natural phenomenon that fascinates many.
潮汐的恒定是一个令许多人着迷的自然现象。
The constancy of his friendship remained unwavering through the years.
他们的友谊经年累月，始终如一。
A true artist finds constancy in their creative process, regardless of external pressures.
真正的艺术家在创作过程中始终保持恒定，不受外界压力影响。