reptiles

30 percent of reptiles, birds, and fish are currently threatened with extinction.

目前，30%的爬行动物、鸟类和鱼类面临灭绝的危险。

The main groups of vertebrates are: fishes, amphibians, reptiles, birds and mammals.

脊椎动物的主要种类是鱼类, 两栖动物, 爬行动物, 鸟类和哺乳动物.

In birds, reptiles and many amphibians there is only one ossicle.

鸟类 、 爬行动物和许多两栖动物只有一块听小骨.

Snakes and crocodiles are both reptiles.

蛇和鳄鱼都是爬行动物.

The effect of these changes on plants and cold - blooded reptiles must have been profound.

这种气候上的变迁必然深深地反映在植物和冷血的爬行动物身上.

Snakes, lizards, and crocodiles are reptiles.

蛇 、 蜥蜴和鳄鱼是爬行动物.

The dinosaurs and numerous other reptiles which had previously been dominant were extinct.

先前曾占主位的恐龙以及许多其他爬行动物到了这时都绝灭了.

Some reptiles, such as snakes or lizards, move very fast.

有些爬虫类, 像蛇和蜥蜴, 移动得非常快.

The dinosaurs, too, belonged to the class of reptiles.

恐龙也同样属于爬虫类.

Birds, reptiles and insects come from eggs.

鸟类 、 爬虫及昆虫是卵生的.

The reconciled reptiles rest on a fragile tile.

和解的爬行动物歇在易碎的瓷砖上。

Reptiles possess a scaly, dry skin.

爬行类具有覆盖着鳞片的干燥皮肤.

Fish and reptiles are more likely to change sex than are mammals or birds.

鱼和爬行动物一般要比哺乳动物或飞禽更容易改变性别.

Scientists think that birds probably evolved from reptiles.

科学家认为,鸟很可能是由爬行动物进化而来的.

All reptiles have to slough their skin to grow.

所有爬行动物生长过程中都要蜕皮。