Over the course of 80 million years, they evolved into tractor-trailer sized, long-necked plant-eaters, like Apatosaurus, formerly known as Brontosaurus.
经过八千万年的演化，他们变成了长脖子的草食性恐龙，并且长得像拖拉机那么大了，就如迷惑龙，以前称雷龙，那么大。
Over the course of 80 million years, they evolved into tractor-trailer sized, long-necked plant-eaters, like Apatosaurus, formerly known as Brontosaurus.
经过八千万年的演化，他们变成了长脖子的草食性恐龙，并且长得像拖拉机那么大了，就如迷惑龙，以前称雷龙，那么大。
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