您要查找的是不是：
- the annual migration of birds 候鸟每年的迁徙
- The seasonal migration of birds. 鸟类的季节性迁移。
- If you wish to plan your trip around the annual migration of the wildebeest you should go between the end of July - September. 在肯尼亚干旱季节你会经常看到很多动物聚集在泉眼附近。如果你想在一年一度羚羊迁徙的时候来那么七月底到九月是最好的季节。
- He described the vernal migration of birds in detail. 他详细地描述了鸟的春季移居。
- He was pleased to get up to the singing of birds. 他很高兴起床听到鸟的歌唱。
- There is lack of uniformity in the annual reports. 这几份年度报告缺乏一致性。
- The annual migration to permanent water holes of vast herds of herbivores (wildebeest, gazelles and zebras), followed by their predators, is one of the most impressive natural events in the world. 每年，当它们为寻找水源而迁徙时，总有食肉动物伴随它们同行，向人们展现了另一个时代，是世界上最壮观的景象之一。
- 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 awakened by the song of birds in the trees. 他被林中的鸟鸣声闹醒。
- 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。
- There was an awful feeling of deja vu at the annual office party. 对一年一度的同事聚会，总有一种年年如是的厌倦感。
- Huge numbers of birds had flocked together by the lake. 成群的鸟聚集在湖畔。
- The annual premium on my policy is 3000 yuan. 我的保险单每年的保险费是三千元。
- 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。
- Vast multitudes of birds visit this lake in spring. 春天有大批的鸟飞临此湖。
- In the annual get-together, we all enjoyed the pleasure of friendship. 在一年一次的聚会里，我们大家共享友谊的乐趣。
- the transoceanic migration of birds 鸟类的越洋迁徙.
- Clouds of birds rose from the treetops. 黑压压一大群鸟儿从树梢飞起。
- He was elected as a delegate to the annual conference. 他被选为年会代表。
- Large numbers of birds migrate south every winter. 每年冬季大量的鸟类迁徙南方。
