数 （一加一后所得） two；形 （两样） different，twain ；

[例句] 他划掉了“编剧”二字，改为“作者”。 He crossed out "Screenplay" and put "Written by" instead.

[例句] 周四晚上9点英国广播公司电视二台开始播放他的新连续剧。 He begins his new series on BBC 2 at 9pm on Thursday.

[电子] diode，two-electrode valve，diode；

[例句] 单支红色发光二极管表示电源已接通。 A single red LED shows that the power is switched on.

[例句] 按这种方式使用的二极管叫做整流管. A diode used in this manner is called a rectifier.

second；

[例句] 香港按人口平均计算的本地生产总值为25,000美元, 在亚洲名列第二. At US $ 25,000, our GDP per capita is the second highest in Asia.

[例句] 第二次违规者要被罚款60美元. Anybody caught breaking this rule the second time will be fined $ 60.

binary system ；

[例句] 二进制 the binary system

[例句] 使用二进制标号法实际上只运用1和0两个数. Using binary notation is in fact just manipulating ones and noughts.

dichotomia，dichotomy，[天] （春分， 秋分） equinoctial ；

[例句] 辩证思维的核心就是二分法。 The essence of dialectical thought is division.

[例句] 如果保持这种二分法,利率会怎样 呢 ? If this dichotomy is maintained what happens to the rate of interest?

[物] two-phase，diphase ；

[例句] 由几乎不相容的液体H2O和CCL4组成的体系具有二相. A system composed of the nearly immiscible liquids H 2 O and CCL 4 has two phases.

[例句] 杠杆规律 ( 除了二元体系之外 ) 还适用于三元体系的二相区. The lever rule applies in two - phase regions of ternary ( as well as binary ) systems.

divalent，bivalence，bivalency，dyadic，bivalent ；

[例句] 我们都是不二价. Our prices are all fixed.

[例句] 他说这白菜概不二价. He said he won't accept any bargaining for the cabbage.

diphosphonic acid ；

[例句] 用高效液相色谱法检测线粒体二磷酸腺苷(ADP) 、三磷酸腺苷(ATP) 含量. Mitochondrial ATP and ADP contents were measured with high performance liquid chromatography.

[例句] 第2d各组分别自颈动脉取血,以比浊法测二磷酸腺苷(ADP) 、 胶原(COL) 、 花生四烯酸(AA) 诱导的血小板最大聚集率. The rate of platelet aggregation induced by ADP, COL, AA was determined.

disome ；

[例句] 在二体假设下, 推导了椭圆轨道上相对运动方程的近似形式. In the two - body case, the approximate equations of relative motion on elliptic orbits are derived.

[例句] 研究了真空熔铸法制备的锰白铜基铸造碳化铬复合材料的二体磨料磨损机理. The abrasion wear mechanism of Mn copper - nickel alloy matrix - cast chromium carbide composite was studied.

diene ；

[例句] 在这些化合物里, 环戊二烯环只有4个氢. In there compounds, the cyclopentadiene ring has only four hydrogens.

[例句] 聚二烯基本分子结构是一良好的燃烧剂. The polydiene basic molecular structure is an excellent fuel.

dimerization ；

[例句] 它们都以二聚物或四聚物状态存在. They may be present as dimers or tetramers.

[例句] 方法对经临床确诊为肺栓塞患者测定其血浆D - 二聚体与纤维蛋白原浓度. Methods: The plasma fibrinogen and D - dimer in pulmonary embolism patients were measured.

[哲] dualism，dualist approach ；

[例句] 他无视传统基督教的肉体与灵魂的二元论。 He ignores the traditional Christian dualism between body and soul.

[例句] 千万别谈地狱的二元论. Don't say a syllable about the Infernal Twoness.

（异心； 不忠实） disloyalty，halfheartedness，unfaithful，insincere ；

[例句] 他早就有了二心. He's been disloyal for a long time now.

（游手好闲、不务正业的人） loafer，idler，bum，lounge lizard ；

[例句] 那么我就来问问这个二流子. Then I question the rascal.

[例句] 交通警察队长桑福德?加勒利克决定对坐地铁的二流子们来一次镇压. Transit Police Chief Sanford Garelick decided to crack down on the bums who ride the trains.

[化] diploid，diplont ；

[例句] 接合形成的合子是部分二倍体,也叫做部分合子. The zygotes formed in conjugation are partial diploids or merozygotes.

[例句] 它是单细胞真菌,有单倍体和二倍体两种存在形态. The fungus is unicellular and exists in both haploid and diploid phases.

ambiguity，dual character，dual nature，duality，twoness ；

[例句] 表现在梅勒作品里的二重性有点不同. The duality illustrated in Mailer's work is rather different.

[例句] 二重性具有奠基功能和拓展功能. In conclusion , the duality has two functions of foundation and expansion.

dioxo ；

[例句] 越南战场上用于毁灭林区的“橙剂”，其成分是二氧杂芑。 Dioxin was the ingredient in Agent Orange, used to defoliate Vietnam.

[例句] 所形成的水解反应物是二盐酸甲撑二氧胺. The resultant hydrolytic reaction product is methylenedioxyamine dihydrochloride.

[有化] alkadiene，allenes，dialkene，dienes ；

[例句] 所加的反应物可以是二烯烃 、 环二烯烃. The feed reactants can be alkadienes, cycloalkadienes.

[例句] 包含两个双键的化合物叫做二烯烃. Compounds containing two double bonds are called dienes.

diterpene ；

[例句] 结论: 豨莶草抗血栓有效组分以二萜类成分为主. Conclusion: Diterpenoids were main compounds in the antithrombotic fraction of Herba Siegesbeckiae.

[例句] 目的: 探讨丹参二萜醌对邻苯三酚自氧化反应产生的氧自由基的作用. Object : To observe the oxygen derived free radicals scavenging of diterpenoid tanshinones by pyrogallol autoxidation systems.

binary，dualistic，[计] dyadic，[化] dibasic ；

[例句] 最重要的一种货币是纸币, 有各种面额的: 一元的, 二元的, 五元的, 十元的等等. The most important kind of currency is paper, in various denominations: one, two, fives, tens, etc.

[例句] 我来此是为了向你展现超越二元的合一. I have come to show you unity beyond duality.