Ancient four-limbed fish crawled out of the sea.
长有四肢的古鱼类离开了大海。
Cameron's Avatar features a world of hexapodal (six-limbed) wildlife, and yet the aliens themselves are four-limbed, which from an evolutionary perspective doesn't make sense.
卡梅隆的《阿凡达》描绘出一个六足野生生物的世界，而外星人他们自己却只有4个足，根据进化的观点那是不合理的。
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