迁徙

It reduces economic productivity and forces migration from depleted countryside to ill-prepared city.

从而降低经济生产率，迫使人们从贫瘠的乡村迁徙到准备不足的城市。

Woman Warrior and The Joy Luck Club are written about American-Chinese women and tell the whole history of Chinese immigration.

这些故事中的女性形象可以分为三大类，即&本土女性形象&、&迁徙的女性形象&和&ABC女性形象&。

Resting in Russia's North Siberian Lowland, this Arctic coastal plain has a Dr. Jekyll and Mr. Hyde complex. In the winter it is an unlivable, harsh tundra, but in the spring, it supports a diverse crowd of wildlife, including fish, sea mammals, wolves, and millions of migratory birds. The delta is fed by the north-flowing Lena River—one of the longest in the world at 2,800 miles (4,400 kilometers).

静止的在俄罗斯北西伯利亚低地，这是北极圈的海岸平原，在冬天是不能居住的冻土地带，但是到了春天，它提供不同的拥挤的野生动植物，包括鱼类，海上哺乳动物，狼群，和数百万迁徙的鸟群，这三角州依靠北面流来的Lena河――是世界最长的河流（4400公里）之一。

Seabirds will fly from here to another place for migration every year .

海鸟每年都要从一个地方迁徙到另一个地方。

The Wildlife refuge is nationally and internationally renowned as a prime birding spot where thousands of water, land and shorebirds stop during migration.

野生保护区在国内和国际上闻名遐迩，是主要的鸟栖地，成千上万的水鸟、陆鸟和岸鸟迁徙时在此停留。

The first reserve on the China coast properly to protect migrating shorebirds and waterfowl was set up in 1975 in Hong Kong, at Mai Po, and is now run by the World Wide Fund for Nature.

中国沿海的第一个保护迁徙海鸟和水禽的保护区是1975年在香港建成的米埔保护区，现在由世界自然基金会管理。

For instance, there's eBird, where amateur birdwatchers can upload information about their bird sightings, and then ornithologists can go, and to help track populations, migrations, etcetera...

比如有个叫eBird 的组织，他们由非专业的爱好者组成，他们把自己录下来的观鸟视频传到网上，鸟类学家则由此跟踪鸟的数量、迁徙等状况。

For instance: there's eBird, where amateur birdwatchers can upload information about their bird sightings. And then ornithologists can go and help track populations, migrations, et cetera.

例如，有一种电子鸟，业余观鸟爱好者可以把自己的观察结果上传，之后鸟类学家可以从中追踪数量，迁徙情况等。

Biologists say an increase in snowy owl sightings across northern states suggests that the Arctic species is doing so well on its northern breeding ground that competition is driving the young ones south

生物学家说，在北部各州发现数量增多的雪鸮表明，这种北极物种在其北部的温床里生活得非常好，以致鸮满为患，导致竞争驱使年轻的雪鸮往南迁徙。

Why mention our disquisitions on the Social Contract, on the Standard of Taste, on the Migrations of the Herring?

为什么要提上我们的社会契约论的学术论文，在标准的品味，对鲱鱼的迁徙？

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。