1.
The dinosaurs died out roughly 65 million years ago.
大约在 6 500 万年前恐龙灭绝了。
2.
Paleontologists know plenty about the demise of the dinosaurs.
古生物学家对有关恐龙灭绝知道的很多。
3.
But this survey will argue that far from being a dinosaur nation, lumbering to extinction, Saudi Arabia is capable of rapid evolution.
不过，我们又不是处在恐龙时代，慢慢等待恐龙灭绝，沙特阿拉伯是完全有能力进行快速改革。
4.
In fact, it is thought that a meteor killed the dinosaurs millions of years ago.
事实上，有人认为在数百万年前就是一块陨石造成所有的恐龙灭绝。
5.
Many physicists suspect the Earth suffered a direct hit from an asteroid or that a comet could be to blame for the extinction.
许多物理学家推测，造成恐龙灭绝的原因可能是当时地球遭到一颗小行星或彗星的撞击。
6.
Greatest Extinction Since the End of the Age Dinosaurs?
恐龙时代之后的最大规模的灭绝？
7.
For example, some scientists believe that dinosaurs became extinct,
例如，许多科学家相信恐龙的灭绝，
8.
extinct reptiles including: dinosaurs; plesiosaurs; pterosaurs; ichthyosaurs; thecodonts.
已经灭绝的爬行动物包括：；恐龙；蛇颈龙；翼龙；鱼龙；槽齿龙。
9.
extinct terrestrial reptiles having birdlike pelvises: armored dinosaurs (thyreophorans); bone-headed and horned dinosaurs (marginocephalians); duck-billed dinosaurs (euronithopods).
长有鸟状骨盆的陆地爬虫动物，现已灭绝；甲壳恐龙；鸭嘴恐龙。
10.
People have propose all sort of hypotheses to explain why dinosaur have become extinct
人们提出种种假设,试图说明恐龙为什麽会灭绝
11.
The Cretaceous period ended 65m years ago with the obliteration of the dinosaurs.
6500万年前白垩纪的结束伴随着恐龙的灭绝。
12.
People have proposed all sorts of hypotheses to explain why dinosaurs have become extinct.
人们提出种种假设,试图说明恐龙为什么会灭绝。
13.
Because dinosaurs are extinct the scientists had very little to go on.
因为恐龙已经灭绝，科学家几乎无法研究。
14.
extinct terrestrial reptiles: theropods (carnivorous); sauropods (herbivorous).
已灭绝的陆地爬虫动物；兽脚亚目恐龙（食肉）；蜥脚类动物（食草）。
15.
The dinosaurs and numerous other reptiles which had previously been dominant were extinct.
先前曾占主位的恐龙以及许多其他爬行动物到了这时都绝灭了。
16.
Dinosaurs are extinct animals.
恐龙是已经绝种的动物。
17.
The dinosaurs disappeared long ago.
恐龙很久以前就绝种了。
18.
The best-known such event was the one that wiped out the dinosaurs 65m years ago, but that was not the worst;
这类事件中最著名的一个就是6500万年前恐龙的灭绝，但这还不是最坏的；