土拨鼠

When a prairie dog senses danger it begins to chirp and retreat to its burrow.

犹他草原土拨鼠拥有很多的天敌，当它们感觉到危险的时候它们会唧唧喳喳的叫然后躲到它们的地洞中。

And farmers destroy smaller animals like the prairie dog and the coyote .

农民则杀死了像草原土拨鼠和郊狼这样的小动物。

Photograph shot on assignment for, but not published in,"Vanishing Prairie Dog," April 1998, National Geographic magazine

图片为《国家地理杂志》1998年四月"消失的草原土拨鼠"一文而摄，未刊发。

Photograph shot on assignment for, but not published in, The Vanishing Prairie Dog, April 1998, National Geographic magazine

图片为《国家地理杂志》1998年4月号"消失的草原土拨鼠"而摄，未刊发。

A Utah prairie dog emerges to forage in spring snow.

一只犹他土拨鼠出现在春雪过后的草料堆上。

Photograph shot on assignment for, but not published in,"The Vanishing Prairie Dog," April 1998, National Geographic magazine

照片受命为1998年4月《国家地理杂志》中的《渐渐消失的土拨鼠》一文拍摄，但未经发表。

Staring Prairie Dog, Utah, 1997

凝视的草原土拨鼠，犹他州，1997

In the winter they have dropped to as low as forty-one degrees below zero. Life in the Badlands is difficult. But animals do survive. The most well known is the prairie dog. This small mammal lives in a series of underground passages.

要想在这片荒地中生活是很困难的，但有些动物却在此生存，这就是著名的土拨鼠，这些小哺乳动物生活在相互联通的地下道中。

Suburban Prairie Dog, Denver, Colorado, 1997

郊区的土拨鼠，丹佛，科罗拉多，1997年

Prairie Dog Nest, Utah, 1997

草原土拨鼠的窝，犹他州，1997

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。