| 1. | These birds migrate northwards in spring and southwards in fall .
这些鸟在春天移栖北方，秋天移栖南方。 |
| 2. | Such birds do us good , though we no longer take omens from their flight .
虽然我们不再从它们的飞行中得到预兆，但是这些鸟对我们还是有好处的。 |
| 3. | We have no idea how the birds find their way
我们不知道这些鸟如何找到它们的路。 |
| 4. | These birds stands on the rock , wings outstretched
这些鸟站在岩石上，翅膀张开着。 |
| 5. | They have published their observations of these birds
他们发表了对这些鸟的观察报告。 |
| 6. | These birds migrate to north africa in winter
这些鸟冬天迁徙到北非 |
| 7. | These birds are able to survive the perils of the arctic winter
这些鸟能够战胜北极冬天的危险。 |
| 8. | The birds won ' t fly away to the south when the weather turns cold
天气变冷之后，这些鸟也不会飞往南方。 |
| 9. | Then look up the birds in your bird book to learn more
然后翻阅你的鸟类书籍、查询这些鸟，以便进一步了解?们。 |
| 10. | Birds signs , you want to plan a strategy based on birds signs
什么鸟征兆，难道要根据这些鸟征兆来指定军事策略？ |
