两栖类的

Although there is no consistent evidence, many researchers suggested that vocal behavior of anuran amphibians were closely related to the circulating levels of sexual hormones.

虽然目前没有一致的证据，但研究结果暗示了很多无尾两栖类动物的广告和攻击鸣叫行为与其体内雄激素水平密切相关。

After lentectomy through the pupillary hole, the epithelial cells at dorsal iris in Anuran tadpole of Bufo raddei Strauch can undergo transdifferentiation to regenerate a new lens. The morphological changes of lens formation from different regeneration stages were observed with both microcope and transmission electron microscope.

以无尾两栖类花背蟾蜍后肢芽期蝌蚪为实验材料，摘除其左眼晶状体，在再生不同时期固定，石蜡连续切片，苏木精-伊红对染，光镜观察，研究晶状体再生的组织来源；另外，选再生不同时期材料用戊二醛，锇酸固定，透射电镜观察，以研究晶状体再生组织的超微结构变化。

The left lens of Anuran Tadpole - Bufo Raddei Strauch Tadpole and Xenopus laevis Tadpole were removed when they had posterior limb bud. By decapitating and fixing it with Carnoy's fixation fluid in different days, by means of paraffin serial section and Hematoxylin-Eosin stain and by using the microscope to observe the microstructure of lens regeneration of Bufo Raddei Strauch Tadpole and Xenopus laevis Tadpole. By extirpating the left eye and fixing it with aldehyde and osmium acid , by using electron microscope to observe the ultrastructure of lens regeneration of Bufo Raddei Strauch Tadpole and Xenopus laevis Tadpole.

以无尾两栖类—以花背蟾蜍与非洲爪蟾后肢芽期蝌蚪为实验材料，摘除其左眼晶状体，在再生不同时期固定，石蜡连续切片，苏木精-伊红对染，光镜观察，研究晶状体再生的组织来源；另外，选再生不同时期材料用戊二醛，锇酸固定，透射电镜观察，以研究晶状体再生组织的超微结构变化。

The invasion of bullfrog has become one of the main factors leading to population decline and extinction of some native amphibians.

牛蛙的入侵已成为一些本地两栖类种群数量下降或灭绝的主要因素之一。

Environmental Protection Agency, about 40 percent of American freshwater fish and amphibian species, including this red-sided dace, are classified as being at risk.

根据美国环境保护法，约有40％的美国淡水鱼和两栖类动物，包括这种红边鱼被认为是一种易受攻击的风险鱼类。

Second earliest fossil amphibian ever found; of the Devonian; found in Greenland.

于格陵兰所发现的稍晚于早期的泥盆纪两栖类化石。

Froggy is just like any other amphibian: He wants to bask in warm sunlight all day, sleep on a cool lily pad at night and eat his fill of insects.

froggy就像任何其他两栖类动物：他要享受在温暖的阳光，所有天，睡在酷百合垫在晚上吃，他填写的昆虫。

Original, amphibians and fish is the relationship between relatives, so this looks like a tadpole fish.

原来，两栖类和鱼类是近缘的关系，所以蝌蚪长得如此像小鱼。

Environmental Protection Agency, about 40 percent of American freshwater fish and amphibian species, including this red-sided dace, are classified as being at risk.

根据美国环境保护局，大约40％的美国淡水鱼和两栖类物种，包括这条红边鲮鱼，分类为是处境危险。

Environmental Protection Agency, about 40 percent of American freshwater fish and amphibian species, including this red-sided dace, are classified as being at risk.

据美国环境保护署，美国大约40％淡水鱼类和两栖类动物，包括这条红色的侧面鲮鱼，被分类为处境危险。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。