fluctuant，oscillatory，[经] variable，up-and-down ；

[例句] 在记入您账户的借方之前，我们总是会就发生变动的数额书面通知您。 We will always confirm the revised amount to you in writing before debiting your account.

[例句] 产品成本降低变动的经济可行性,总是决定于对产品的继续需求情况. The economic feasibility of cost - reducing changes will always depend on sustained need.

[化] allochroic，allochromatic，[医] allachroic ；

[例句] 在这风云变色的几年间, 北京陷落了. As the difficult years passed , Peking fell.

[例句] 分别探讨了接插件镀金和镀银层变色的原因. The causes of tarnishing gold and silver - plated connectors were studied respectively.

hardened，indurative ；

[例句] 这些矿物质形成了菌斑的结晶变硬的结构. These minerals form crystals and harden the plaque structure.

[例句] 变硬的熔岩块象雨点般降落在山下村庄. Boulders of hardening lava can rain down on villages.

[医]lessen，tail off ；

[例句] 鲁宾逊咖啡屋里的人正在变少，但也只是渐少而已。 The crowd in Robinson's Coffee-House was thinning, but only by degrees.

[例句] 首先, 激励人们避免去伤害他人的因素变少了. First, people would have less incentive to avoid injuring other people.

meliorate ；

[例句] 有时候要到达谷底，才会慢慢变好。 Sometimes things have to fall apart to make way for better things.

[例句] 不知怎的，他已经恢复了平静，连心情也变好了。 He had recovered his equilibrium and even his good humour, somehow.

[医]negative acceleration ；

[例句] 在分子转动的变慢中, 城市的振动就下降. In the slowing of molecular rotation, the cities drop in vibration.

[例句] 间谍软件使电脑变慢, 制造弹出广告. Spyware slows computers down, and creates pop up ads.

reduce ；

[例句] 他是人能迅速变瘦的活见证. He is walking proof that people can lose weight quickly.

[例句] 请收紧一下这条衬衫, 我变瘦了. Please take in this skirt -- I've lost weight.

purpling ；

[例句] 战俘们吓得脸色变紫. The prisoners went blue with terror.

[例句] 你的腿怎么了? 都变紫了. What's wrong with your leg? It's bruised.

[医]strengthen ；

[例句] 弱者由于蛮干变强,强者由于克制变弱. The weak gain strength through effrontery and the strong grow weak because of inhibitions.

[例句] 但是那场事故中你变强了! 你可以做你以前不能做到的事情. But that accident made you stronger! You can do things you could never.

shorten ；

[例句] 夏至之后白天开始变短. The days begin to draw in after the summer solstice.

[例句] 过了夏至,天就开始变短. The days get shorter after the Summer Solstice.

transform ；

[例句] 为了求出这个变换式, 我们回顾图14 - 1. To derive the transformation equations , we return to Fig. 14 - 1.

[例句] 圆盘和圆环等的变换式显然将是圆形对称的. The transforms of disks and rings and the like will obviously be circularly symmetric.

variable ；

[例句] 指数可以用于反映一组变量的综合变化. A single index may reflect a composite, or group, of changing variables.

[例句] 在热力学中,我们经常涉及两个或更多变量的函数. In thermodynamics we usually deal with functions of two or more variables.

[医] variant ；

[例句] 他论证说,生物是由于一些小的遗传变异的积累而逐渐演变的. He argued that organisms evolve gradually by accumulating small hereditary changes.

[例句] 蛋白酶是阻止非典病毒变异的关键物质. A protease is key to the replication of the virus.

[医]straighten ；

[例句] 路变直了，我们驶上了高原。 The road straightened and we were on a plateau.

[例句] 这弯曲的金属片自己可以变直. The bent strip can straighten up by itself.

sweeten ；

[例句] 你的茶里加了蜂蜜变甜了. Your tea is sweetened with honey.

[例句] 梨子熟了就会变甜. The pears will sweeten as they ripen.

come to a point ；

[例句] 她变得不耐烦了,声音也变尖了. Her voice sharpened as she became impatient.

[例句] 她的声音提高变尖. Her voice rose to a shriek.

thickening，thicken ；

[例句] 晒后皮肤会变厚、变干、变粗糙。 Skin thickens, dries and coarsens after sun exposure.

[例句] 随着我们年龄的增长，眼睛的晶状体变厚，因此对光线的折射也会发生变化。 As we age the lenses of the eyes thicken, and thus refract light dif-ferently.

tighten ；

[例句] 人穿的鞋子会因吸饱了水而变紧,惟其本人则不会(醉). A man's shoes get tight by imbibe water, but he do not.

[例句] 当球队 阵容 轮换境况变紧了,那样进来季后赛的话,会怎么样 呢 ? How does that translate into the post - season, when the rotations get tighter?

shoal ；

[例句] 我晒黑的肤色逐渐变浅了. My tan's beginning to fade.

[例句] 在反向点以上,井孔内的温度将随着深度的变浅而下降. Above the inversion point the temperature in the bore hole decreases as the depth decreases.

variability ；

[例句] 凹陷内核桃园组沉积具有显著的继承性又有变化性. Hetaoyuan deposition in the depression has obvious characters of inheritance and variability.

[例句] 变化性和预测性: 我们能做什么? Variability and predictability: what can you do about it?