陆地动物

Shore, they encountered chal lenges that no vertebrate had ever faced be

当四足动物冒险上陆地，他们遭遇到挑战是要面对无脊椎这样的状况---这

Ants are the most abundant and diverse animal species in subterranean ecosystem. They establish various complicated associations with other organisms, in which some ant groups form the oldest mutualism with fungi and become famous mycophagous insects.

蚂蚁是陆地生态系统中种类和数量最为丰富的动物类群，与其他许多物种都具有广泛而复杂的联系；其中一些类群与真菌形成古老的共生关系，成为著名的菌食性昆虫。

For years, the hippo has been the leading candidate for the closest land relative because of its similar DNA and whalelike features.

多年来河马一直是主要的陆地最近亲动物的选定代表，因为河马有其相似的 DNA 以及有鲸类特征。

A mother and her calf hippopotamus cool off in the "Land of the Surfing Hippos."

意译：动物的妈妈和婴儿们。妈妈和她的小河马凉爽在陆地冲浪河马。

Whereas the proximal part of the tetrapod limb skeleton can easily be homologized with the paired fin skeletons of sarcopterygian (lobe-finned) fish, there has been much debate about the origin of digits.

早期的假设认为，四足动物的足趾与鱼类的放射鳍同源，但根据发育研究结果，同时根据一种名叫&潘氏鱼&、与陆地脊椎动物密切相关的目前已经灭绝的鱼（这种鱼似乎没有末梢的趾状放射鳍）的鳍，这一观点似乎并不可靠。

Extinct terrestrial reptiles having birdlike pelvises: armored dinosaurs; bone-headed and horned dinosaurs; duck-billed dinosaurs.

长有鸟状骨盆的陆地爬虫动物，现已灭绝；甲壳恐龙；鸭嘴恐龙。

Just as land animals flee the electromagnetic screeches that rock under pressure release, sea life likewise attempt to flee.

陆地上的动物感知到了下面的岩石遭受了压力所释放出来的刺耳的电磁声，然后会逃跑，同样海洋生物也会尝试逃跑。

Gary Packard of Colorado State University and his colleagues do not deny that creatures like Apatosaurus, Brachiosaurus and Diplodocus were big—and bigger than any terrestrial mammal.

科罗拉多州立大学加利·帕卡德和他的同事并不否认雷龙、腕龙和梁龙是巨型动物，并且认同它们大于任何陆地哺乳动物。

Some of the senses that we and other terrestrial mammals take for granted are either reduced or absent in cetaceans or fail to function well in water.

从某种程度上说，人类和其它陆地哺乳动物一样，拥有少量甚至没有鲸类动物所特有的功能，因而理所当然的不能在水里。

In the preceding months changes in land elevation and in ground water levels, widespread reports of peculiar animal behavior, and many foreshocks had led to a lower-level warning.

在此前几个月里，陆地高度和地下水位的变化、关于动物反常行为的大量报告以及几次前震已经对此作了低级别警报。

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。