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| 31. | building plastics |
| 建筑塑料 |
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| 32. | melamine plastic |
| 蜜胺塑料|三聚氰胺塑料 |
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| 33. | plastic ablator |
| 烧蚀塑料|塑料烧蚀材料 |
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| 34. | unicellular plastic |
| 单孔塑料 |
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| 35. | irrational synthesis |
| 非示构合成|非有理合成 |
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| 36. | plastics shoe |
| 塑料鞋 |
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| 37. | the chief solid component of mammalian urine; synthesized from ammonia and carbon dioxide and used as fertilizer and in animal feed and in plastics. |
| 哺乳动物尿中主要的固体成份，可由氨和二氧化碳合成，用作肥料、饲料和制塑料。 |
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| 38. | plastic sandals |
| 塑料凉鞋 |
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| 39. | Its scientists are working on combining this new film with plastic to form one substance. |
| 他们的科学家正着手研究把这种新型膜与塑料结合起来，合成一种新的材料。 |
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| 40. | plastic coating |
| 塑料涂层 |
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