1.Nail biting is often a subconscious reaction to tension.

1.咬指甲通常是紧张时的下意识反映。

2.After these days of excitement there was a reaction.

2.经过这几天兴奋之后又有一生活。

3.The heat brings about a chemical reaction, and oxygen is liberated.

3.热量引起化学反应, 释放出氧气。

4.A catalyst is a substance which speeds up a chemical reaction.

4.催化剂是一种加速化学反应的物质。

5.The modificative for coke can decrease CRI(Coke Reaction Index),improve CSR(Coke Strength after Reaction).

5.焦炭改性剂可以改善焦炭的热性,即降低焦炭的反应性,提高反应后强度。

6.She injected them with phytohaemagglutinin (PHA), a substance that induces an immune reaction.

6.她为它们注射了植物血球凝集素（PHA），这种够引起免疫反映的物质。

7.The reaction principal, reaction procedure and flowsheeting in the potassium sulfate method are included.

7.给出了甲酸钠法的反应原理、反应过程以及工艺流程。对原料消耗、产品规格及质量测定作了简单介绍。

8.VTT also laccases intercomparsion reaction catalyzed by enzymes, non-ferrous products of indicator for leakage.

8.VTT也利用漆酶催化促酶反应形有色产物，研究渗漏指示剂的构。

9.Experimental results show that the reaction acts up on transannular-surroundings electron transfer reaction mechanisms.

9.表明，此反应遵循外环外界电子转移反应机理。

10.Three novel malononitrile derivatives have been synthesized by the solid state reaction at room temperature.

10.固相反应合了新型丙二腈类化合物。

11.Intracellular PHB depolymerase and 3 hydroxybutyrate dehydrogenase catalyze the initial reactions of intracellular PHB catabolism.

11.进一步比较研究了不同菌株的PHB解聚酶和3羟基丁酸脱氢酶的活性。

12.Only her quick reaction prevented an accident.

12.她的快捷反应避免了一次事故。

13.The reaction produced some oxides and other by-products.

13.该反应产生了几种氧化物和其他伴生物。

14.Their reaction to the joke is to laugh.

14.他们对这个笑话的反应是笑。

15.Does sudden drop bender have nonabstainer what reaction?

15.喝酒的人突然戒酒会有什么反应?

16.Carrie's immediate reaction was one of relief.

16.嘉丽的第一反应是松一口气。

17.Widespread reactions of this sort could steepen its dive.

17.普遍这类反应将会加快它的跳水。

18.What are the chemical reaction characteristics of tropane alkaloids?

18.氢溴酸东莨菪碱的鉴别原理是什么？

19.Concepts of metamorphism, metamorphic reaction, prograde and retro – metamorphisms.

19.变质岩的一般概念、变质反应、进变质和退变质。

20.Reaction kinetics is far less perfect than thermochemistry theory.Why?

20.化学动力学远不及化学热力学那么完美。