contrary flexure，retroflexion ；

[例句] 小波函数使用反曲型母小波模拟,电路由双极型晶体管、可控放大器和线性无源电子元件等组成. This paper proposes an analog synthesis circuit of a wavelet function approximator using sigmoidal mother wavelet.

[例句] 屋顶坡度平缓, 微微向上反曲, 瓦陇排列与椽飞同. The roof's steep, a slight upward inflection, tile arrangement with the rafters fly with the Gansu.

[法] dissenting vote，negative vote，opposing vote，vote in the negative，blackball ；

[例句] 斯科比惊讶地问道:“你是说他会投她的反对票吗?” "You mean he's going to vote against her?" Scobie asked in surprise.

[例句] 他原打算投反对票，后来改为弃权了。 He changed from voting against to abstaining.

antagonistic，opponent，[机] inverse，invert，anti ；

[例句] 听他的话音,便知他是反对的. Judging from his tone, there's no doubt he is against it.

[例句] 她不会反对的——她是那么顺服温和. She won't object — she's so meek and mild.

antiparticle，[医] anti-particle ；

[例句] 粒子和 反 粒子是物理学中最迷惑人的概念之一. The particle - antiparticle concept is one of the most fascinating ones in physics.

[例句] 这种性质通常称为 “ 螺旋性”, 可以用来区分中微子和它的反粒子. This property, often called " helicity,'serves to differentiate the neutrino from its antiparticle.

reflective，catoptric，[计] refleeted，reverberatory，reflected ；

[例句] 反射的阳光可使这些城市节约用电. The reflected sunlight would allow these cities to save up electricity.

[例句] 他们可以观察月亮反射的光的光谱. They could look at the spectra of the light the moons reflected.

retrorse，reversed，[计] inverted，[医] anastrophic，return ；

[例句] 腿部, 膝关节是反向的. The legs, if transformed correctly , are reverse jointed at the knees.

[例句] 很遗憾, 这种兼容性是反向的,CD播放器不能播放DVD光盘. Unfortunately, this compatibility is backwards and so CD players will not play DVDs.

iterative，reduplicative，[医] reduplicated，reiterative，reduplicate ；

[例句] 通过对化石证据的仔细反复的研究是可以得出答案的. The answers may lie in a close reexamination of the fossil evidence.

[例句] 经过反复的解释,学生们总算明白了. After repeated explanation the students understood.

[语] irony，antiphrasis，enantiosis ；

[例句] 这怎么啦?[反语]这有什么不好? What's wrong with it?

[例句] ( 反语 ) 他真不怕难为情! I like his impudence ! ( ironic, meaning that his impudence is prepesterous or amusing )

[医] anticyclone ；

[例句] 反气旋天气情况比气旋天气情况更有利些. The anticyclone weather situations are more favorable than the cyclonic ones.

[例句] 欧洲南部上空的反气旋给各地区带来了晴朗的好天气. A high over southern Europe is bringing fine sunny weather to all parts.

[化] antimatter ；

[例句] 还有那些人们不大谈到的, 构想更为新奇的 反 物质武器和脑弹的设计. There are the much less talked - about, more exotic designs for anti - matter weapons and brain bombs.

[例句] 银河中心之外, 反物质云不是完整的球形. Beyond galactic centre, the cloud is not entirely spherical.

conversely，the other way round ；

[例句] 我们活着是为了什么？不就是给邻居当笑柄，再反过来笑他们。 For what do we live, but to make sport for our neighbours, and laugh at them in our turn?

[例句] 理论的基础是实践,反过来理论又为实践服务. Theory is based on practice and in turn serves practice.

reflector，viewfinder ；

[例句] 她能够看到自己在反光镜中被缩小的古怪形象。 She could see herself in the reflecting lenses, which had grotesquely foreshortened her.

[例句] 当然,还需要有人安置和拆卸反光镜. But the reflectors do of course have to be emplaced and removed.

reactant，reagent，substrate ；

[例句] 而用激光则能够激发反应物的某些特定的运动模式. Lasers can excite specific modes of the reactants.

[例句] 在化学过程中,氧气经常充当为反应物. Oxygen is often used as reactant in chemical processes.

antigravity ；

[例句] 互锁的反重力推进器为弯刀型提供了无与伦比的机动性. Interlocked repulsorlift thrusters provide the Scimitar with exceptional maneuverability.

[例句] 好像屋顶是反重力的,随时可能倒下. The structure playfully feels as though it defies gravity and may topple.

[数] arc tangent，antitangent ；

[例句] 要计算反正切的表达式 ( 浮点小数型 ). Expression to compute the arc tangent of ( float ).

[例句] 计算指定参数的反正切 ( 按弧度 ). Computes the arc tangent ( in radians ) of the specified argument.

complementing，negate ；

[例句] 不允许对2的补数的最小值求反. Negating min value of a two's complement number is not allowed.

[例句] 阅读612页关于求反矩阵的内容. Read pp. 612 on finding the inverse matrix.

abnormal，eccentric，[医] acatastatic，anarchic ；

[例句] 那架飞机以反常的速度起飞升空。 The aircraft rose with unnatural speed on take-off.

[例句] 他在揣摩他们行为反常的原因. He was feeling after a reason for their unusual conduct.

breaking，segregation，coacervation，demulsify ；

backacting shovel （挖土机），backhol ；

[例句] 反铲挖掘装置作业性能也可达到同类产品的国际先进水平. The performance of backhoe loader can reach the advanced international level.

jet power，kick，recoil strength，reactive thrust ；

[例句] 这是因为发动机的反冲力系统开动了,好减慢飞机的滑行速度. This is because the engine reverse - thrust system is used to slow the plane.