清风托福代报名快讯:到2015年04月07日上午托福官网没有释放考位,托福代报提醒考生抓紧时间报名,托福代报提示考生注意自己的考试时间~ 托福归纳写作优异作文练习题素材:恒温动物是指比方现代鸟类和哺乳动物这种能够坚持体温稳定的动物。比方,人是恒温动物,托福代报名为我们带来托福归纳写作优异作文练习题:恒温动物恐龙,托福代报名期望对我们托福备考有所协助。 托福归纳写作阅览资料: Endotherms are animals such as modern birdsand mammals that keep their body temperatures constant. For instance, humansare endotherms and maintain an internal temperature of 37℃, no matterwhether the environment is warm or cold. Because dinosaurs were reptiles, andmodern reptiles are not endotherms, it was long assumed that dinosaurs were notendotherms. However, dinosaurs differ in many ways from modern reptiles, andthere is now considerable evidence that dinosaurs were, in fact, endotherms. 恒温动物是指比方现代鸟类和哺乳动物这种能够坚持体温稳定的动物。比方,人是恒温动物,不管环境温度是如何,体温都维持在37℃。由于恐龙归于爬虫类,而现代的爬虫类都不归于恒温动物,所以长期以来恐龙都被作为是变温动物。可是,恐龙在许多当地都同如今的爬虫类不一致。一起,如今有许多的依据标明恐龙其实是恒温动物。 Polardinosaurs One reason for believing that dinosaurswere endotherms is that dinosaur fossils have been discovered in Polar Regions.Only animals that can maintain a temperature well above that of the surroundingenvironment could be active in such cold climates. 极地恐龙 建议恐龙归于恒温动物的原因是在极地发现了恐龙。只要能够极好维持体温的动物才能在如此冰冷的当地生计。 Legposition and movement There is a connection between endothermyand the position and movement of the legs. The physiology of endothermy allowssustained physical activity, such as running. But running is efficient only ifan animal’s legs are positioned underneath its body, not at the body’s side, asthey are for crocodiles and many lizards. The legs of all modern endotherms areunderneath the body, and so were the legs of dinosaurs. This strongly suggeststhat dinosaurs were endotherms. 腿的方位和运动方法 恒温动物和腿的方位及运动方法有一定联络。恒温动物的生理构造答应它们进行继续的物理运动,比方奔跑。可是,只要当腿长在身体的下部而不是两边的时分才能疾速地奔跑,而像鳄鱼或者许多蜥蜴的腿,都是长在身体两边的。一切现代恒温动物的腿都是长在身体下部的,而恐龙的腿也具有相同的特色。这很有力地阐明了恐龙是恒温动物。 Haversiancanals There is also a connection betweenendothermy and bone structure. The bones of endotherms usually includestructures called Haversian canals. These canals house nerves and blood vesselsthat allow the living animal to grow quickly; and rapid body growth is in facta characteristic of endothermy. The presence of Haversian canals in boneis astrong indicator that the animal is an endotherm, and fossilized bones ofdinosaurs are usually dense with Haversian canals. 哈弗森管 恒温动物和骨构造之间也有相应的相关。许多恒温动物都有一种名为哈弗森管的骨构造。这种哈弗森管能够维护神经和血管以保证动物疾速地成长,而疾速成长恰恰是恒温动物的一个特征。哈弗森管的存在能够有力的阐明该动物归于恒温动物,而恐龙的骨骼化石中常常能够观察到哈弗森管。 托福归纳写作阅览有些需求获取的观念是: - Main point: 恐龙是恒温动物 - Sub point 1: 恐龙的化石在极地发现,而极地只要恒温动物生计,所以恐龙是恒温动物。 - Sub point 2: 恐龙有跟恒温动物相同的腿构造,所以恐龙是恒温动物。(这个是有逻辑缝隙 的,一会在听力有些我再解说) - Sub point 3: 恐龙跟恒温动物相同的哈弗森管,所以恐龙是恒温动物。 最后,托福代报名预祝大家考试顺利