migration agent

The structure of avian community and migration dynamic of main groups.

唐海湿地鸟类群落结构特征及主要类群的迁徙动态。

Survey of Breeding and Behaviors of Black-crowned Night Heron in Reed Ditch Area of Capital International Airport

首都国际机场地区夜鹭迁徙动态和繁殖生态初步研究

used of animals that do not migrate.

用来指不迁徙的动物。

resident fauna.

无迁徙习性的动物群

Overcrowding is another reason that animals travel.

过度拥挤是动物迁徙的另一个原因，

used of animals that move seasonally.

用来指随季节迁徙的动物。

Two-Way Flow of Population Marks Free Migration

人口双向流动是“自由迁徙”的标志

On the Migration on the Eurasian Grassland in the Early 11th Century;

论11世纪初期欧亚草原上的迁徙运动

The morphological baits, distribution and population dynamics, habitat and feeding, grouping and migration, social behaviors, and breeding of Pantholops hodgsoni were reviewed in the paper.

综述了藏羚的形态学特征、分布与种群动态、生境与食性、集群与迁徙以及社群行为与繁殖等。

Ambient temperature is one of the most important factors that restrict cold-blood vertebrate distribution, existence, breeding, migration and so on.

环境温度是制约冷血脊椎动物分布、生存、繁殖、迁徙等活动最重要的生态因子之一。

Preliminary Study on Population Dynamic and Flocking of Corvus dauurica in Winter and Migratory Season at Milu Park,Beijing

北京麋鹿苑达乌里寒鸦迁徙和越冬期种群动态与集群行为的初步研究

The Proto-biological Documentary "Bird Migration" Appreciated;

浅谈法国原生态纪录片《迁徙的鸟》的细节处理

Many migrating animals such as birds, whales, and butterflies use magnetism for navigation.

很多迁徙的动物，如鸟、鲸鱼和蝴蝶用地磁来导航。

By mid-October Operation Migration was ready.

到了10月中旬，迁徙行动的准备工作就绪。

The nationality migration in Jin Dynasty was the result of compelling policy of the government.

金朝社会人口流动是统治阶级强制迁徙的结果。

Some creatures find safety in numbers and travel in flocks, schools or herds.

有些动物群集而居，迁徙时成群结队以求安全。

The two-way flow will mark the free migration of population.

这种人口的双向流动是“自由迁徙”的标志。

The Reasons and Effects of the First Black Great Migration

美国黑人第一次大迁徙运动的原因及影响

A Spatial Econometrics Analysis of Economic Development and Labor Immigration;

经济发展与劳动力迁徙的空间实证研究