| 1. | They built lighthouses to facilitate the navigation of the seas. |
| 他们修建灯塔以利海上航行。
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| 2. | All navigation is now stopped on account of the ice. |
| 由于结冰，所有的水上交通都停了。
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| 3. | Navigation is suspended in consequence of the lowness of water in the river. |
| 由于河道水浅，航行暂停。
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| 4. | There has been an increase in navigation through the canal. |
| 通过那条运河的船只增加了。
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| 5. | The river is open for navigation . |
| 此河可通航。
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| 6. | Our knowledge of the oceans a hundred years ago was confined to the two-dimensional shape of the sea surface and the hazards of navigation presented by the irregularities in depth of the shallow water close to the land. |
| 100年前，我们只知道海洋是二维平面形的，以及靠近陆地浅水区的深浅不一能给航行带来危险。
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| 7. | Naval officers must understood both the theory and practice of navigation . |
| 海军军官对于航海术的理论与实践皆需了解。
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| 8. | an expert in navigation |
| 航行学专家
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| 9. | aids to navigation |
| 航标；导航（辅助）设备
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| 10. | open (up) a new era of navigation |
| 开辟航海新时代
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