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- The seasonal migration of birds. 鸟类的季节性迁移。
- He described the vernal migration of birds in detail. 他详细地描述了鸟的春季移居。
- We appreciate your action in reporting this information, which will contribute to our understanding of the migration of birds in the East Asian-Australasian Flyway. 我们感谢您的报告，这对我们了解迁徙的鸟类在东亚洲及澳大利亚迁徙飞行路线的了解非常有帮助。
- He was pleased to get up to the singing of birds. 他很高兴起床听到鸟的歌唱。
- the transoceanic migration of birds 鸟类的越洋迁徙.
- Scientists have studied the migration of fish over long distances. 科学家研究过鱼类远距离回游的现象。
- Vast multitudes of birds visit this lake in spring. 春天有大批的鸟飞临此湖。
- Clouds of birds rose from the treetops. 黑压压一大群鸟儿从树梢飞起。
- He was awakened by the song of birds in the trees. 他被林中的鸟鸣声闹醒。
- Large numbers of birds migrate south every winter. 每年冬季大量的鸟类迁徙南方。
- The oil spill endangered thousands of birds. 石油的溢泄危及成千上万的鸟儿。
- You can find whole regiments of birds on the islet. 在那个小岛上你可以看到成群的鸟。
- These woods are frequented by all kinds of birds. 这些树林里经常栖息着各种鸟类。
- There has been a migration of people from the country to the towns. 人们从乡下移居城镇。
- Having lobate toes. Used of birds. 蹼足的有叶状趾的。指鸟类
- He described the vernal migration of birds in detail 他详细地描述了鸟的春季移居。
- There was a huge migration of people into Europe because of the war. 因为战争，大量的移民涌入欧洲。
- That kind of bird has become more numerous around here lately. 近来在附近一带那种鸟越来越多了。
- Promoting orderly migration of people. 26、促进人口有序迁移和流动。
- Huge numbers of birds had flocked together by the lake. 成群的鸟聚集在湖畔。
