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51. | ethylhexyl sebacate |
| 二癸二酸酯 |
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52. | difurfuryl disulbide |
| 二糠基二硫 |
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53. | diphenyl silanediol |
| 二苯基硅二醇 |
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54. | dibenzyl disulfide |
| 二苄化二硫 |
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55. | Two from four leaves two. |
| 四减二剩下二。 |
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56. | TWO AND TWO MAKE FIVE |
| 二加二等于五。 |
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57. | ethyl diselenide |
| 二乙化二硒 |
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58. | dinitro naphthalene disulfonic acid |
| 二硝基萘二磺酸 |
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59. | Two plus two is four. |
| 二加二等于四 |
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60. | (2) Provinces and autonomous regions are divided into autonomous prefectures, counties, autonomous counties and cities; |
| (二) |
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