strike back，beat back，counterattack，counterfire，counterpunch ；

[例句] 他愤怒地反击，说这些话太过幼稚。 He hit back angrily, saying such remarks were childishly simplistic.

[例句] 当被别人弄疼时我们本能的反应是反击。 Our instinctive reaction when someone causes us pain is to strike back.

revolt，insurgence，uprising，insurrection，rebelled ；

[例句] 到目前为止，反叛分子面对威胁的反应非常谨慎。 Rebel sources have so far reacted cautiously to the threat.

[例句] 她那3年的自由仿佛是对孩童时代的反叛。 Her three years of freedom seemed like a reaction against that childhood.

palirrhea，backstreaming，regurgitation，countercurrent ；

[例句] 喂得太快会引起腹胀和反流. Feeding too rapidly will cause abdominal distension and regurgitation.

[例句] 钡剂反流进入回肠末端. There is reflux of barium into the terminal ileum.

reverse osmosis ；

[例句] 反渗透主要应用于生活用含盐水的脱盐. Principal application of reverse osmosis has been in desalting brackish waters for domestic consumption.

[例句] 环境工程师应用反渗透原理的机会并不多. The environmental engineer does not have much opportunity to apply the principle of osmosis.

reflection of light，flash back ；

[例句] 这些云带必定引起行星反照率的经向不对称性. These bands must introduce longitudinal asymmetry in the planetary albedo.

[例句] 如果恒星的光谱已知, 就可得出尘埃的反照率. If the stellar spectrum is known, the albedo of the dust can be obtained.

repercussion，echo，reverberation，resounding，backwash ；

[例句] 这份报告并未收到热烈的反响。 The report had not been received with undiluted enthusiasm.

[例句] 我认为这次反响还不错。 I think the response was good.

bounce，bound，knock-on，impingement ；

[例句] 那子弹从墙上反跳回来. The bullet ricocheted from the wall.

[例句] 假设分子与板碰掸后粘附在板面上,而不是反跳开. Assume that the molecules stick to the plate rather than rebound.

counteroffensive，counterattack，counterblow，countercharge，react ；

[例句] 军队现在似乎已经发起了反攻。 The army now appears to have launched a counter-offensive.

[例句] 将军正在集结部队准备反攻。 The General was massing his troops for a counterattack.

[生] anti-form，transform，trans- ；

[例句] 反式脂肪含量低的食物 foods that are low in trans fats

[例句] 乙烯和反式二氯乙烯在红外光谱的这个区域都无活性. Ethylene and trans - dichloroethylene are both inactive in the infra - red in this region.

ruminate，chew the cud，regurgitation，rumination，regurgitate ；

[例句] 在咀嚼反刍食物的牛 cows chewing the cud

[例句] 附近地里的牛仍在安静地反刍食物。 The cow in the nearby field was still chewing placidly on its cud.

be disgusted with，be averse to，dislike，take unkindly to，antipathy ；

[例句] 我们越来越反感他益发无趣又缺乏见地的言论。 We became increasingly fed up with his increasingly unfunny and unintelligent comments.

[例句] 许多观众对银幕暴力心存反感。 Many viewers have strong opinions about violence on the screen.

reflect on oneself，examine one's own conscience，introspection，self-questioning，meditate ；

[例句] 经过反省，他说自己对所作的评论感到非常后悔。 On reflection, he says, he very much regrets the comments.

[例句] 作为音乐上的 “ 超人 ”, 他们自己当然也有过反省和解释. As'superhumans " in music, they made introspections and explanations about their deeds.

dish，reflector ；

[例句] 反射器通过支架牢牢地固定在航天器的侧面。 The reflector is held onto the sides of the spacecraft with a frame.

[例句] 这里说明一下,反射器并不是一定需要用到那种空白的印刷电路板. Note that you don't have to use blank PCB for the reflector.

disproof，counterevidence，（用反证明） give [furnish] counterevidence，disproval，rebutter ；

[例句] 甚至反证摆在眼前,他仍不能相信. He could not believe even with the disproof before his eyes.

[例句] 对于这种突然变化的信念, 在胚胎学上提出了强有力的反证. Against the belief in such abrupt changes, embryology enters a strong protest.

reversal，reverse，[计] REV，rollback，reversion ；

[例句] 全息图可以通过反转显现出逆像。 The hologram can be flipped to show the inverse image.

[例句] 我们可以用各种方法来实现这种必要的粒子数反转. The necessary population inversion can be achieved in a variety of ways.

[体] backhand ；

[例句] 阿加西反手一击。 Agassi hit a backhand.

[例句] 他反手一击把我截击的空中球打了回来(网球中). He responded to my volley with a backhand, ie in tennis.

（敌方人员投诚） come over from the enemy's side；

[例句] 你决定吧，反正鱼与熊掌不可兼得。 Make up your mind, you can't have it both ways.

[例句] 反正我们本来就打算在那间屋里贴墙纸的。 We were going to wallpaper that room anyway.

ask in reply，answer a question with a question，[语]rhetorical question ；

[例句] 他微微皱了下眉头，显然并不期待任何人回答他的反问。 He grimaced slightly, obviously expecting no answer to his rhetorical question.

[例句] 我顶了嘴，反问了几句。 I talked back and asked questions.

conspire against the state，plot treason，plot a rebellion，rebel，rebellion ；

[例句] 当贵族谋反时, 国王便出兵攻打他们. When the nobles rebelled, the king battled them.

[例句] 谋反者是经不起惊吓的. A conspirator is not of the stuff to bear surprises.

antiproton ；

[例句] 狄喇克的理论还预言有一种质子的姐妹粒子,带负电荷, 叫做反质子. Dirac's theory also predicted a negatively charged sister for the proton, called the antiproton.

[例句] 你将需要100000个Fermilab制造出的反质子才能够点燃一盏灯. You would need 100,000 Fermilabs to power a single light bulb.