But webbed feet no doubt were as useful to the progenitor of the upland goose and of the frigate-bird, as they now are to the most aquatic of living birds.
但蹼足无疑对陆雁和军舰鸟的祖先有用, 就像它们对现存的大多数水生鸟类一样有用。
单词 | upland goose |
例句 |
原声例句
物种起源 But webbed feet no doubt were as useful to the progenitor of the upland goose and of the frigate-bird, as they now are to the most aquatic of living birds. 但蹼足无疑对陆雁和军舰鸟的祖先有用, 就像它们对现存的大多数水生鸟类一样有用。 |
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