那是一块经过数百万年而形成的巨大岩层。
它其实是古代树木的汁液，经过数百万年硬化而成的。
Amber is actually ancient tree sap that has hardened over millions of years.
珊瑚由数百万微小生物的遗骸组成，经过数百万年的堆积，每一百万年就形成了一座岛屿。
Coral was made up of the bodies of millions of tiny creatures, piled up over millions of years -a million years for each island.
随着她右手里的手术刀微妙地移动，她伸出左手指给我看经过数百万年的进化产生出来的奇迹。
With a scalpel held delicately in her right hand, she reaches over with her left to show what millions of years of evolution has produced.
经过数百万年的进化，人类身躯适应于最大程度的保护脆弱敏感的部位，并且人体愈加坚韧耐用。
Over millions of years, the human body has adapted to maximize efficiency, protect our most delicate areas, and be durable and tough.
它在英格兰南部的海上县，它通过那些令人称奇的岩层和化石，展示了地球经过数百万年的的形成这一美丽的过程。
It is one of southern England's maritime counties. It reveals a beautiful story of the earth's formation over millions of years, through some of the amazing rock formations and fossils.
“尼罗河魔鬼”鱼经过数百万年的自然演化，具有独特的形体结构和运动方式，能很好地适应水生环境。
During millions of years' evolution, Gymnarchus Niloticus has gained a unique physique and special movement form, it can adapt to the underwater environment very well.
来自牛津大学的科学家称，狗是人类最好的朋友，经过数百万年，它智力的进化速度比喜欢独居的猫快得多。
The intelligence of man's best friend has evolved at a greater rate than the less social cat over millions of years, scientists at Oxford University claim.
科学家们认为是强烈的地震，使得这一地区的海底向上隆起，出了水面，经过数百万年的演变，它越来越高，形成了陆地和山脉。
Scientists believe strong earthquakes forced the bottom of the sea to rise above the water. After millions of years, it was pushed up into the air to form land and mountains.
一个被称作‘连生’模型，指尘埃碎块经过数百万年的时间聚集形成了一颗行星的固体核心，之后它将周围的气体俘获据为己有。
In one - the 'accretion' model - small clumps of dust build up over millions of years to form a planet's solid core, which then pulls gases towards it.
这类顾忌要成为一个问题，其前提必须是：经基因改造的鱼其生存和繁殖能力要比那些经过数百万年的自然选择挑选出来鱼更高。
For that to be a problem, it would have to be the case that the modified fish were better at surviving and reproducing than those honed by millions of years of natural selection.
经过数百万年的积累，甲烷水合物被储存在海底沉积物当中，这是一种强大的温室气体，数量介于700万亿至10000万亿吨之间。
Between 700 trillion and 10,000 trillion tons of methane hydrate, a powerful greenhouse gas, are trapped in the seafloor sediments where they've accumulated over millions of years.
牛津大学的最新研究成果表明，经过数百万年的漫长进化，如今的狗类较之猫类拥有更大的脑。这是因为与独居动物相比，高度群居类的哺乳动物需要运用更多的脑力。
Over millions of years dogs have developed bigger brains than cats because highly social species of mammals need more brain power than solitary animals, according to a study by Oxford University.
冰川是经过数千年甚至数百万年累积而成的浓密冰雪。
Glaciers are simply accumulated snow, packed densely into ice over thousands, even millions, of years.
冰川是经过数千年甚至数百万年累积而成的浓密冰雪。
Glaciers are simply accumulated snow, packed densely into ice over thousands, even millions, of years.
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