两栖的

The presence of a mosaic of salientian and caudatan characters in this small fossil makes it a key taxon close to the batrachian divergence.

在这具小化石中兼具无尾目及有尾目两栖类的特征，因此它是接近于蛙形两栖类分歧的关键类群。

Then the FLUENT software was used to simulate the amphibious vehicle' ambient flow field through defining the unsteady boundary condition. The lift, resistance, velocity, pressure, and wave of the amphibious vehicle moving in the regular waves were obtained, which can avoid the errors resulted from neglecting the free surface and provides theoretic basis for the research on optimization design of high performance amphibious vehicle.

在计算出某改进型两栖车在微幅规则波中高速迎浪运动时升沉和纵摇特性的基础上，运用FLUENT软件，通过自定义非定常入口边界实现了两栖车在微幅规则波中运动的三维流场数值模拟，得到了升力、阻力、速度、压强和兴波等流场参数，实现了两栖车在波浪中的绕流场数值模拟，解决了以往由于忽略兴波特性导致数值计算结果随航速提高误差不断增大的问题，为高性能两栖车的外形设计研究提供了理论依据。

Hong Kong Society of Herpetology Foundation supports the campaign of 2008 The Year of the Frog in order to raise awareness among government, media, school educators, and people generally about the vulnerability of amphibians and the extinction crisis they face.

香港两栖及爬行动物保育基金/香港两栖及爬虫协会支援"两栖动物方舟"和"2008爱蛙年"的宣传工作，目的在於提高政府、传媒、学校教育以及大众对於两栖动物脆弱性和它们所面临灭绝危机的整体意识。

The CH-53 is one of the few helicopters with an instrument landing system to enable landings in bad visibility to ILS-equipped air bases.

CH-53常被布置在海军的两栖攻击舰上，是美海军陆战队由舰到陆的主要突击力量之一，在美军两栖作战任务中起到非常关键的作用。

It has since been replaced in the heavy lift mission by the CH-53E Super Stallion. The CH-53 is one of the few helicopters with an instrument landing system to enable landings in bad visibility to ILS-equipped air bases.

CH-53常被布置在海军的两栖攻击舰上，是美海军陆战队由舰到陆的主要突击力量之一，在美军两栖作战任务中起到非常关键的作用。

Based on the analysis of the resources situation and problems, it has been suggested by the authors that the protection of ecological environment and species varieties of Anura in Gansu should be strengthened.

本文在对甘肃无尾两栖类动物资源状况及存在的问题进行分析的基础上，提出了加强无尾两栖类动物生境和物种多样性保护，从而合理利用无尾两栖类动物资源的建议。

The partly cold-adaptation stratagem of the high altitude amphibian tadpole were researched in the laboratory by analyzing the high altitude amphibian tadpole of Scutiger boulengeri mainly on endpoints related to the dynamic variation of the micro-spatial behavior distribution patterns, the experiment of the temperature tolerance, and the enzyme content and activity of the lactic acid dehydrogenase isozyme in special temperature condition.The behavior distribution of the Scutiger boulengeri t...

西藏齿突蟾蝌蚪在不同温度的行为分布是一连续、动态过程，需用多种检验方法综合利用才能进行判断；在15℃，除低海拔分布的西藏齿突蟾种群外所有实验物种蝌蚪均符合负二项分布、NeymanⅡ型分布；在10℃，高海拔两栖类蝌蚪均符合负二项分布、NeymanⅡ型分布；在5℃、0℃低温时，高海拔两栖类不同分组的西藏齿突蟾蝌蚪的负二项分布、NeymanⅡ型分布均呈现明显差异，这可能与高海拔两栖类蝌蚪在低温条件下通过不断地改变其行为分布方式来避免自身被冻伤有关。

Sixteen ( 15 new) amphibian and twenty-two ( 11 new) squamate species have been reported across China, including the oldest Chinese tetrapod Sinostega pani from the Late Devonian of Ningxia Hui Autonomous Region, the large stereospondyl amphibian Yuanansuchus laticeps from the Middle Triassic of Hubei Province, Late Jurassic/Early Cretaceous lissamphibians ( e. G., the anurans Callobatrachus sanyanensis and Mesophryne beipiaoensis, the caudates Jeholotriton paradoxus and Laccotriton subsolanus) from Northeast China, Paleogene lizards (e. G., Brevidensilacerta xichuanensis and Tinosaurus yuanquensis) from North China, and numerous lizards from the Late Cretaceous of Nei Mongol Autonomous Region.

共报道了16种两栖类和22种有鳞类，其中15种两栖类和11种有鳞类为新种，包括我国最古老的四足动物宁夏晚泥盆世的潘氏中国螈，湖北中三叠世的大型全椎两栖类宽头远安鲵，东北晚侏罗世/早白垩世的多种滑体两栖类(如无尾类三燕丽蟾和北票中蟾，有尾类奇异热河螈和东方塘螈)，华北古近纪的蜥蜴类(如淅川短齿蜥和垣曲响蜥)，以及内蒙古晚白垩世的多种蜥蜴类等。

For the Batrachuperus tibetanus, the follicle cells are the main sites for e2, P and T, but the thecal cells are not shown to product steroid.

说明，在卵母细胞发育中，有尾两栖类和无尾两栖类性类固醇激素的作用有一些差异。

In order to analyze the change of amphibious vehicle resistance before and after the wheels were retracted, because the configuration complexity of bodywork,and turbulent was severity about it,so the theoretical solution was very difficult,therefore the resistance of bodyworks in water was simulated and analyzed by Fluent before and after the wheels were retracted.

为了分析车轮收起前后两栖车水中阻力的变化，考虑到两栖车车体结构复杂，车体周围湍流严重，难于用理论求解，因此，利用计算流体力学软件Fluent，对车轮收起前后的阻力进行仿真分析。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。