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| 61. | To protect the Dunhuang grottoes, one has to start with an understanding of the surroundings. |
| 保护敦煌石窟，必须先从掌握周围自然环境入手。 |
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| 62. | Cadmium poisioning in livestock and poultry was due t o industrical cad mium polluting and high content cadmium of feed and natural environment. |
| 家畜和家禽镉中毒是由于饲料富含镉和工业镉污染及高镉的自然环境引起的。 |
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| 63. | cause a commotion; make a stir; cause an accident. |
| 引起骚乱；引起流行；引起事故。 |
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| 64. | Animals in a zoo are not living in their natural surroundings. |
| 动物园里的动物不是生活在自然环境之中。 |
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| 65. | In their natural environment, they travel dozens of miles every day. |
| 在自然环境中，它们每天行走数十公里。 |
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| 66. | A Method for Evaluating Synthetic Natural Environment |
| 综合自然环境仿真系统的评估方法研究 |
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| 67. | Lave, R. "Designing Change: Transforming Cultural Attitudes towards the Natural Environment." 1997. |
| 设计改变：将人文态度转变成自然环境＞，1997. |
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| 68. | ask for trouble; invite criticism. |
| 引起麻烦；引起危机。 |
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| 69. | They also are trying their best to create a natural environment that is close to the animals' original birthplace. |
| 他们尽量创造出接近其原产地的自然环境。 |
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| 70. | Animals in zoos are not in their natural surroundings. |
| 动物园里的动物不是生活在自然环境中。 |
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