白垩纪的

Yet, upon further reflection, human impact on the planet is a direct analogue of the Cretaceous cometary collision.

然而进一步的说，人类对于地球的影响，完全相当于白垩纪的彗星撞击。

I am on an Oligocene beach, an Eocene beach, a Cretaceous beach -- the scene is the same.

我正在渐新统的海滩上，或在始新世的海滩上，或在白垩纪的海滩上——场景不变。

His waistcoat was creased, there was a button off his glove, his coat looked as if it was dusty with French chalk.

他的背心弄皱了，手套上有个钮扣，他的外套满是白垩纪的灰尘。

Any of various plant - eating,amphibious sauropod dinosaur s of the genus Titanosaurus,common during the Cretaceous Period especially in South America.

雷龙一种泰坦龙，食草的水陆两栖蜥脚类恐龙，在白垩纪的南美尤为常见

Dinosaurs of the genus Titanosaurus, common during the Cretaceous Period especially in South America.

雷龙一种泰坦龙，食草的水陆两栖蜥脚类恐龙，在白垩纪的南美尤为常见

Any of several four footed herbivorous horned dinosaurs with enormous beaked skulls of the late Cretaceous in North America and Mongolia .

几种四食草性长角的恐龙，巨大的颅骨呈嘴；生活在后白垩纪的北美和蒙古。

Any of several four footed herbivorous horned dinosaurs with enormous beaked skulls of the late Cretaceous in North America and .

几种四足草性长角的恐龙，巨大的颅骨呈鸟嘴状；生活在后白垩纪的北美和。

Qingyang pterosaur found before only found in the Junggar pterosaur fossils of the Cretaceous pterosaur is even; and Qingyang pterosaur pterosaur Junggar than earlier, more primitive Chiroptera late Jurassic pterosaur dragon type.

庆阳翼龙发现之前，仅仅在新疆准噶尔发现过翼龙化石，尚且是白垩纪的翼龙；而庆阳翼龙是比准噶尔翼龙更早、更原始的晚侏罗纪翼手龙类翼龙。

The source of mafic dikes are mixed with depleted mantle and enrichment mantle, but the contents of the former is more than that of the later.

本期的基性岩脉微量元素含量、MORB标准化模式和同位素与前面白垩纪的基性岩脉明显不同，软流圈参与其源区明显增多。

Any of numerous carnivorous dinosaurs of the Triassic to Cretaceous with short forelimbs that walked or ran on strong hind legs.

三叠纪至白垩纪的许多食肉恐龙，前肢短，靠其强壮的后肢走或跑。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。