在埃及沙漠中挖掘时，古生物学家们发现了巨大的骨骼化石，这似乎是有史以来体型第二大的恐龙。
While digging in the Egyptian desert, huge fossil bones have been found by paleontologists, which appears to have been the second most massive dinosaur that ever lived.
正如其他恐龙一样，他们在出生以后身体就急速得成长到较大的体型，如此他们才能避免在再受到Sanajehindicus此类捕食者的侵害。
Like other dinosaurs, they are thought to have grown to a large size quickly after hatching. Until then, they would have been highly vulnerable to predators such as Sanajeh indicus.
随着其他大型恐龙的灭绝，使得Raptorex有机会将体型进化成硕大型，最终成为巨大的霸王龙。
As other large dinosaurs became extinct, this left the path clear for Raptorex to expand in body size and ultimately become the giant Tyrannosaurus rex.
科学家知道体型庞大的哺乳类们在恐龙灭绝后的几百万年就进化了出来。
Scientists knew that extremely large mammals evolved within a few million years after the end of the dinosaurs.
拖着四根缎带般的硕长尾羽，羽片上还排列着羽支，体型只有鸽子大小的耀龙为我们提供了恐龙利用绚丽羽毛进行展示的最早证据。
Sporting a quartet of long, ribbonlike feathers with barbs arranged in vanes, pigeon-size Epidexipteryx may provide the earliest evidence of a dinosaur flaunting its feathers for display.
它们都是像兔子一样的食草恐龙：体型小、数量多、速度快，而且没有多少护甲。
They are the rabbits of the plant-eating dinosaurs: small, common, fairly fast, and they didn't have a lot of armor.
虽然母象要撑起公象那15000磅体重的相当一部分完全没有问题，但体型最大的恐龙可是重达10万磅啊。
While elephant females are perfectly capable of supporting a good portion of the male's 15, 000 pounds, the largest dinosaurs weighed 100, 000 pounds.
虽然母象要撑起公象那15000磅体重的相当一部分完全没有问题，但体型最大的恐龙可是重达10万磅啊。
While elephant females are perfectly capable of supporting a good portion of the male's 15,000 pounds, the largest dinosaurs weighed 100,000 pounds.
在6千5百万年前恐龙因陨石撞击消失殆尽之际，体型小巧的哺乳动物统治了地球。
After the dinosaurs were wiped out by a massive meteor strike 65 million years ago, tiny mammals ruled the Earth.
恐龙的高度适应性可能也解释了为什么哺乳动物的体型总是那么小，这种情况一直持续到六千五百万年前恐龙大规模灭绝。
Dinosaurs' high level of fitness could also explain why mammals remained so small until the mass extinction of the dinosaurs 65 million years ago.
原角龙是一种食草恐龙，体型和绵阳差不多大小。专家们都认为他们曾在白垩纪时期过着群居的生活。
The Protoceratops was a vegetable-eating dinosaur about the size of a sheep that experts believe lived in herds during the Cretaceous Period.
它体型和三角恐龙一样，是恐龙家族的大个子。
This was another large dinosaur, the same size as triceratops.
小盗龙，生活在距今六千六百多万年前的白垩纪，是现今中国境内发现的众多体型娇小、长有羽毛的恐龙之一。
Microraptoris one of many small, feathered dinosaurs found in what is now China that were alive during the Cretaceous period more than 66m years ago.
拖着四根缎带般的硕长尾羽，羽片上还排列着羽支，体型只有鸽子大小的耀龙为我们提供了恐龙利用绚丽羽毛进行展示的最早证据。
Sporting a quartet of long, ribbonlike feathers with barbs arranged in vanes, pigeon -size Epidexipteryx may provide the earliest evidence of a dinosaur flaunting its feathers for display.
现在按照体型由小到大的顺序画出或是临摹出10只恐龙。
当然，也有很多体型小的恐龙。
当然，也有很多体型小的恐龙。
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