n.反复无常，不坚定，无恒心，易变，不规则

His inconstancy in his relationships has made it difficult for him to maintain long-term friendships.
他在人际关系中的多变性使他很难维持长久的友谊。
The weather's inconstancy this spring has made gardening quite a challenge.
今年春天天气的多变给园艺工作带来了相当大的挑战。
Her mood swings and inconstancy of character were baffling to those who tried to get close to her.
她情绪的波动和性格的多变让试图接近她的人感到困惑。
The inconstancy of the internet connection was frustrating for online gamers.
网络连接的不稳定让在线游戏玩家感到沮丧。
His political views have shown a remarkable inconstancy over the years, shifting from one extreme to another.
多年来，他的政治观点表现出显著的多变性，从一个极端摇摆到另一个极端。
The inconstancy of supply disrupted the smooth operation of the manufacturing plant.
供应的不稳定打乱了制造工厂的顺畅运作。
Her fashion sense was known for its inconstancy; she could never decide on a single style.
她的时尚感以多变为人所知；她总不能决定坚持一种风格。
The inconstancy of his work schedule made it hard for him to commit to after-work activities.
他工作时间的不固定性让他难以承诺参加下班后的活动。
The team's performance suffered due to the inconstancy of their star player's form.
由于明星球员状态的不稳定，团队的表现受到了影响。
Inconstancy in customer preferences is a challenge that marketers must constantly adapt to.
客户偏好的多变性是营销人员必须不断适应的挑战。