当我们在托福口语问题Task3Task4中做问题时，有没有发现相关海洋动物的问题占了一定的比例？以Task4为例，TPO1-66中有22个生物学问题，占1/3；相关海洋动物有5个问题，分别是TPO13/14/45/49/65，约占1/4。除了TPO49关于鱼类群居的危害外，其他问题都在讨论海洋动物为了适应海下生活而发展的适应性(adaptation) 在这里，我们将选择上述题目中的文本，为学生普及背景知识。下面由新航道的沈阳托福培训小编为您解答！

　　叶海龙

　　the Leafy Sea Dragon

　　它看起来像一条绿色的小龙，上面长满了凸起的叶子。它的颜色和形状都是海底植物。当你游泳时，捕食者很难找到它。

　　it resembles a small green dragon with leaf-like protrusions sticking out like arms. Now because its colors and shapes, it blends in extremely well with green sea plants. So when the Leafy Sea Dragon is swimming through these plants, predators have trouble seeing it.

　　乌贼

　　the Cuttlefish

　　乌贼可以通过眼睛将视觉印象传递到神经中枢，然后向色素细胞发出信号，通过色素细胞的扩张和收缩变色，从而融入周围环境，防止被捕食者发现。

　　Cuttlefish have shifting pigments that allow them to change color in a matter of seconds, so they can almost instantaneously match their color of their surroundings. If they’re swimming by green sea plants, they’ll turn green. And if they’re swimming over the brown sea floor, they’ll turn brown.

　　吞噬鳗

　　Pelican eel

　　鳗鱼嘴和胃都很大，很有弹性，所以它可以吞下比自己大得多的成分，然后获得更多的营养，争取更多的时间。

　　there's a species of eel that has an enormous mouth and a large stomach that's capable of expanding. And these unusual features allow this eel to eat prey larger than itself. That's a big advantage because if the eel eats something big, that's a lot of food, a lot of nutrition. So the eel can go for quite a while before it has to find food again.

　　海洋动物非常神奇，外表和特征多样，了解它们的习惯，有利于我们的口语使用！

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