新托福考试阅读练习：鸟蛋的各种色彩
复活节快到了，制作复活节彩蛋成为近期热门的活动。在自然界中，鸟下的蛋其实也是天生的“彩蛋”，颜色千差万别，这是为什么呢?今天的新托福考试阅读练习资料会告诉我们原因。 Depending on the species, bird eggs can be any color ranging from chicken’s plain white to a robin’s blue, streaked, spotted, bright, pale, and anything in between. We take a look at some of the reasons this might be the case. But first, how do eggs get their color? As the egg moves down the female’s oviduct, the tube that connects the ovary to the outside, it squeezes against glands that produce colored pigments that combine to for... [ 查看全文 ]新托福考试阅读练习：鸟蛋的各种色彩的相关文章
