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| 31. | acid-base reaction and equilibrium |
| 酸-碱反应和平衡 |
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| 32. | of low birth or station (`base' is archaic in this sense). |
| 出身或地位低微的（'base'在此意义上是古语词）。 |
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| 33. | To convert into a base. |
| 碱化转化为碱 |
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| 34. | bimolecular elimination through the conjugate base |
| 双分子共轭碱消除 |
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| 35. | Billy is still trying to get to second base with Sara. |
| （注：在美国，这是一具有约定俗成意义的短语，在男女之间的关系中，"first base"指拉手、接吻等；"second base"指抚摸等；"third base"指做爱。） |
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| 36. | Having only one hydrogen ion to donate to a base in an acid-base reaction; monoprotic. |
| 一（碱）价的在酸碱反应中只有一个氢离子转移到碱上的；一碱价的 |
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| 37. | petroleum nitrogen base |
| 石油中的含氮碱 |
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| 38. | (chemistry) of or denoting or of the nature of or containing a base. |
| （化学）某种碱的、表示某种碱的、具有某种碱的特性或者含有某种碱。 |
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| 39. | neutralize an acid with a base |
| 以碱中和酸 |
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| 40. | A pyrimidine base, C5H6N2O2, that is an essential constituent of DNA. |
| 胸腺碱一种属于脱氧核糖核酸重要成分的嘧啶碱 |
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