changeable，changeful，varied，levity ；

[例句] 她情绪多变，时而咄咄逼人，时而又显得温柔平和或乐于合作。 Her aggressive moods alternated with gentle or more co-operative states.

[例句] 这两座建筑物体现了爱尔兰建筑风格的极致多变。 These two buildings typify the rich extremes of Irish architecture.

[物] shear，shearing ；

[例句] 在那里，对我来说一切变得很不顺利。 Everything turned sour for me there.

[例句] 双梯形的试样将产生切变脱胶现象. A double trapezoidal specimen will generate shear debonding.

change，alteration，oscillation，modification ；

[例句] 上个月提议的变动在3月份的预算中已经有所预兆了。 The change proposed last month was foreshadowed in the March Budget.

[例句] 价格可能会有所变动。 Prices may be subject to alteration.

gradual change，[生]anamorphism，anamorphosis，shade，shadow ；

[例句] 铺好的宽阔道路渐渐变窄,成了一条崎岖不平的小径. The wide paved road degenerated into a narrow bumpy track.

[例句] 冬至以后,白天渐渐变长. The days begin to draw out after the winter solstice.

invariant，fixedness，immovability，invariability，steadiness ；

[例句] 我们在威斯敏斯特教堂看到的是一种经年不变的古旧仪式。 What we see at Westminster is a tired old ritual.

[例句] 如果其他条件不变，大多数房客都愿意住单人间而不会选择与他人同住。 Other things being equal, most tenants would prefer single to shared rooms.

mutability，inconstancy，variability，volatility ；

[例句] 英国的天气易变是有名的. The weather in Britain is notoriously changeable.

[例句] 我可以把他们易变的、不成熟的心灵雕塑成最适合我的工具. From their flexible and unformed minds I can carve out my fittest tools.

[生]varietas，variety，variant，variation，mutation；

[例句] 斑驴是一种极美丽的斑马变种。 The quagga was a strikingly beautiful variant of the zebra.

[例句] 人类既不能创造变种, 亦不能阻止变种发生. The man can neither originate varieties, nor prevent their occurrence.

[计] indexed address，index，indexing，address modification ；

[例句] 一种通过变址寄存器修改地址的技术. A technique of address modification by means of index registers.

[例句] 自动修改变址寄存器内容. Automatic modification of the index register.

betray one's country, party, etc.，turn traitor，turn renegade，muting，mutiny ；

[例句] 叛变被残酷地镇压了下去。 Rebellions were put down with appalling barbarity.

[例句] 他终于因叛变行为而受到惩罚. He was eventually brought to book for his treachery.

make a political recantation，change of loyalty，betrayal，turn one's coat，apostasy ；

[例句] 他变节投向另一方是最终的背叛. His defection to the other side was the ultimate betrayal.

[例句] 他们还是防备他可能变节,或者两者兼而有之. They tried to protect themselves against his possible treachery or both of course.

（改变事物的本质） transform，reform，alter，change ；

[例句] 1998年对所有人来说都是重要的一年：那是个变革的时期。 1998 was an important year for everyone: a time of change.

[例句] 南非正在经历一场不可逆转的变革。 South Africa was going through a period of irreversible change.

[医] （变态反应； 过敏症） allergia，allergy ；

[例句] 这些儿童也接受了肺功能检查及变应性试验. The children were also gien lung function and allergy tests.

[例句] 香叶木素具有 抗 诱变和 抗 变应性特性. The crane lignin has the anti - mutagenesis and the anti - allergy characteristic.

develop，evolve，evolution，evolvement，outcome ；

[例句] 周末右翼分子对外国人的攻击最终演变成了这场骚乱。 The unrest capped a weekend of right-wing attacks on foreigners.

[例句] 家鸡是由东南亚原鸡演变而来的。 Domestic chickens are descended from jungle fowl of Southeast Asia.

in disguised form，covert，phasing ；

[例句] 通过提高停车费，变相制裁车辆的使用。 Use of the car is penalized by increasing the fares of parking lots.

[例句] 和两个不同的主胁变相对应的主方向是互相正交的. The principal directions corresponding to two distinct principal strains are orthogonal.

catastrophe，cataclysm ；

[例句] 周期性的局部地区的灾变降低了种群的数量. Periodic local catastrophes reduce populations.

[例句] 最著名的灾变论的对立理论就是渐变论. The most popular alternative to catastrophism is the gradualistic approach.

allosteric ；

[例句] 这种具有两个不同而又相互作用位置的蛋白质叫做变构蛋白质. Proteins which have two separate but interacting sites are called allosteric proteins.

[例句] 这种具有两个不同位置而又相互作用的蛋白质叫做变构蛋白质. Proteins which have two separate but interacting kinding sites are called allosteric proteins.

（重大事件） incident，emergency，exigency，the course of events，event ；

[例句] 我们应该分析这场事变的因果. We should analyze the cause and effect of this event.

[例句] 他办事变得同他祖父一样心狠手辣. He developed into the ruthless operator his grandfather had been.

grow，become，make，develop into，fall ；

[例句] 我们服的药相对来说药性温和，但是我们却在把它们变成毒药。 We're taking relatively benign medicines and we're turning them into poisons.

[例句] 她意识到自己趾高气扬的步伐已变成了拖着脚走路了。 She noticed her own proud walk had become a shuffle.

transition，changes，vicissitudes，change in trends or conditions，flux ；

[例句] 从这家小餐馆能清楚地看到世事的变迁。 The cafe was a good vantage point for watching the world go by.

[例句] 各种语言的语音总在不断变迁. The speech sounds of all languages are gradually but constantly changing.

[数] variation （函数的） ；

[例句] 磁带成本高，而且每录制一次音质就会变差一些。 Tape is expensive and loses sound quality every time it is copied.

[例句] 她的视力因年岁的增长而变差了. Her eyesight grew dim with age.