in a way that is not possible to be changed
不可更改, 板上钉钉
别担心，规则并不是一成不变的。
in the same situation for such a long time that it is no longer appealing
陷入一成不变的生活, 困在单调重复中
我需要改变；我已经好几个月困在一成不变的生活里了。
to reach a significant stage in development and become accepted by the majority of people
走向主流, 获得广泛认可
当家庭开始彻底放弃有线电视时，流媒体走向了主流。
a complete or notable change compared to what the situation originally was
巨大变化, 根本转变
公众对远程办公的态度发生了巨大变化。
someone who only tends to stay at a place, particularly a house, for a relatively short period of time before moving on to another
居无定所的人, 四处漂泊的人
她把房间租给那些居无定所的人，他们每隔几周就来来去去。
a combination of both good things and bad things that can happen to one
起起落落, 好坏时光
这家公司在成功之前经历了许多起起落落。
to be passed to another owner
易主, 转手
这幅画在进入博物馆前几经转手。
to allow another person to continue one's work or to take care of one's responsibilities
交接重任, 把任务交给别人
创始人已经准备好把接力棒交给更年轻的团队。
something that becomes so familiar to someone that it can be done without thinking
第二天性, 习惯成自然
出门前检查门现在对他来说已经成了第二天性。
to make changes to one's behavior or mindset in order to become a better and more responsible person
改过自新, 重新做人
她承诺会改过自新，不再把自己的错误归咎于别人。
to put a stop to one's habit, particularly one that is harmful or dangerous
戒掉坏习惯, 改掉坏毛病
她总是咬指甲，想在面试前改掉这个习惯。
a situation or experience that involves significant ups and downs, sudden changes, or intense shifts in emotions, circumstances, or events
跌宕起伏, 大起大落
经营小生意就像坐过山车，一周很好，下一周又糟透了。
to fundamentally transform something, often with far-reaching consequence
彻底改变某事, 改写某事的面貌
这一发现可能彻底改变癌症治疗。
a regular or repeated change
起起伏伏, 有涨有落
每段长久的友谊都会有自然的起落。
to stay the same despite time and progress in society, technology, or culture
停留在过去, 跟不上时代
他们的招聘流程还停留在过去，所有事情仍然靠纸质文件完成。
to let go of outdated practices or beliefs and embrace changes
告别旧的一套, 摒弃旧观念
新校长想告别旧做法，用信任取代僵硬的规则。
something that is changing all the time and cannot be easily predicted
变幻不定的局面, 难以预测的形势
这家公司正试图在不断变化的科技市场中发展。
(especially of prices) to increase suddenly and dramatically
暴涨, 飙升
暴风雨过后，建筑材料的价格暴涨。
to experience a sudden and significant decline in one's emotional state, confidence, financial situation, etc.
暴跌, 一落千丈
交易失败后，公司股价暴跌。
to not interfere with or try to improve something that is already satisfactory or functioning well
别折腾已经好好的东西, 保持现状就好
我本想重新整理文件，但玛丽亚说已经可以了，别再折腾。
to follow the current plans, expectations, or rules, often indicating a need to adjust, cooperate, or keep up to date with others or the existing situation
跟上节奏, 配合大局
如果马克想留在团队里，就得学会配合。
to completely disrupt someone's life, plans, or normal situation
to disturb or change something completely and chaotically
