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| 41. | Plants provide many chemicals that can be useful to humans, especially for drugs and insecticides. |
| 植物能为人类提供有用的化学物质，特别是药物和杀虫剂。 |
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| 42. | be good or useful enough for sb's purpose |
| 对某人（之需）有好处或有用处. |
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| 43. | Based on these results, Hirudoid ointment is considered to be a useful drug for the treatment of senile |
| 基于这些研究，喜疗妥软膏被认为是治疗老年性干燥症的有效药物。 |
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| 44. | I thought he would be useful as a double for you. |
| 认为他或许可当影子武士 所以就叫人放他 |
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| 45. | Silicon nitride films are known to be very useful for many different aspects in material science, and |
| SiN_X薄膜是一种性能优良的材料,可以对硬盘进行保护,并且厚度低于2nm。 |
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| 46. | "Featuring hundreds of reproductions of archaeological discoveries, this should be a useful resource |
| 本书以上百个考古发现的翻拍为特色,对于任何对中国古代感到兴趣的人,将会是个有用的资源 |
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| 47. | The volumetric measurement of putamen could possibly be a useful method for diagnosis of PD in early |
| 壳核的体积测量可能为早期PD的诊断提供一种有效的方法。 |
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| 48. | In fact, XML wouldn't be useful if not for the arrival of Cascaded Style Sheets (CSS) on the Web technology |
| 实际上，如果在Web技术舞台上没有出现“串接的样式单（CSS）”，XML是没用的。 |
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| 49. | They are responsible for providing information on past performance that may be useful as guidance for |
| 他们负责提供以往经营业绩的信息,这些信息对预测未来的经营业绩有参考价值。 |
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| 50. | I wonder If a steel key would be useful to you, American? For 100 currency It could be yours. |
| 我在想钢制钥匙对你有没有用？美国人？100元就是你的。 |
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