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| 1. | filtration Barrier |
| 滤过屏障 |
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| 2. | natural noise barrier |
| 天然噪音屏障 |
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| 3. | The vast reed marshland serves as a protective screen. |
| 浩瀚的芦苇荡像一个天然的绿色屏障。 |
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| 4. | photoelectric barrier |
| 光电屏障 |
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| 5. | This ditch provides a natural defense for the castle. |
| 这条沟堑为这个城堡形成了一道天然的屏障。 |
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| 6. | a protective screen; a shield; a shelter; a barrier |
| 屏障 |
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| 7. | perimeter barrier |
| 外围屏障；周界屏障 |
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| 8. | Ecological protective screen |
| 生态屏障 |
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| 9. | The mountains on both sides are natural barriers embracing a naval base inside. |
| 它就像一座天然的屏障，将军港环抱在臂弯之中。 |
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| 10. | mountain barrier |
| 高山屏障 |
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