They will tum out to be the second-largest species of birds to become extinct.
它们将成为第二大灭绝的鸟类。
Tigers are the largest species of the Felidae family. They have unique vertical stripes.
虎是猫科动物中体形最大的一种,身上有独特条纹。
Octopuses vary greatly in size: the smallest is abort 5 cm long, while the largest species may grow to 5.4m in length.
章鱼大小差异极为显著;最小的只有5厘米长,最大的可能达到5.4米。
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