The paintings were concealed beneath a thick layer of plaster.
那些画被隐藏在厚厚的灰泥层下面。
The baby whale develops a thick layer of blubber to protect it from the cold sea.
幼鲸长出一层厚脂肪以抵御冰冷的海水。
This layer of water reduces friction.
这层水减少了摩擦。
Beneath the soil lies a layer of bedrock.
土壤下面有一层基岩。
They found a unique layer of sediment worldwide.
他们在世界各地发现了一层独特的沉积物。
Soon layer of oceanic ooze began to accumulate above the old hard layer.
很快，海洋软泥层开始在原先的硬地层上面堆积起来。
In the angiosperm the seeds are wrapped in an additional layer of covering.
被子植物的种子被另一层覆盖物包裹着。
The resulting smaller bubbles also yield a layer of foam whose texture is rich and creamy.
由此产生的较小的气泡也会让产出一层质地浓郁、像奶油一般的泡沫。
During the seventeenth and eighteenth centuries, the entire site became covered with a layer of hard grey clay, which minimised further erosion.
在十七世纪和十八世纪，整个遗址被一层坚硬的灰色粘土覆盖，这极大减少了进一步的侵蚀。
Geologists think that this fluidized ejecta crater indicates that a layer of permafrost, or water ice, lies just a few meters under the surface.
地质学家认为，这个具有流体化喷出物的陨石坑表明，在地表下几米深处有一层永久冻土层或水冰。
Leatherbacks do not have blubber, but they do have a reptilian equivalent: thick, oil-saturated skin, with a layer of fibrous, fatty tissue just beneath it.
棱皮龟没有鲸脂，但它们有和爬行类动物相似的结构：厚且含油的皮肤，下面有一层纤维，再下面是脂肪组织。
If you peel birch bark in the winter, we call it "the winter bark", another layer, a tougher inner layer of the tree adheres to the bark, producing a stronger material.
如果你在冬天剥桦树皮，我们称它为“冬树皮”，另外一层更加坚硬的紧贴树皮的树层就可以生产出更强更硬的材料。
While this showed astronomers that Venus was surrounded by a thick layer of gases refracting sunlight around it, both effects made it impossible to obtain accurate timings.
尽管这向天文学家证明了金星被一层厚厚的气体所包围，这层气体使太阳光在金星周围发生折射，但这两种效应都使精确的时间控制成为不可能。
Basal slip or sliding as it's often called, basically refers to the slipping or sliding of a glacier across bedrock, actually across a thin layer of water on top of the bedrock.
底部滑移，也通常被称为滑动，大致指的是冰川在基岩上的滑动，实际上是在基岩上部的一层薄薄的水上的滑动。
Just below the chromatophores is a layer of cells that reflect light from the environment, and these cells help the octopus create a precise match with the colors that surround them.
色素团下面是一层细胞，它可以反射周围环境的光，这些细胞可以帮助章鱼精确地匹配周围的颜色。
Many ants are small and forage primarily in the layer of leaves and other debris on the ground.
许多蚂蚁很小，主要在地面的树叶和其他碎屑中觅食。
The birch tree has white bark, and this tough protective outer layer of the tree, this white bark, is waterproof.
桦树有白色的树皮，树上这个坚硬的保护外层，这个白色的树皮，是防水的。
You see, adult female birds during egg production produce a layer of spongy bone tissue inside certain long bones.
你看，成年雌鸟在产蛋的过程中会在某些长骨内产生一层海绵状的骨组织。
Today such gravitational compensation probably would not occur: the outer layer of the Moon is too cold and stiff.
今天这种引力补偿很有可能不会发生：月球的外层过于寒冷和坚硬。
Between the last layer of Cretaceous rock and the first layer of Cenozoic rock, there is often a thin layer of clay.
在最后一层白垩纪岩石和第一层新生代岩石之间，常常有一层薄薄的粘土。
In some cases, colleges and universities might have to change their training programs, adding another layer of difficulty.
在某些情况下，学院和大学可能不得不改变他们的培训计划，这增加了计划的难度。
During some periods, the bottom layer of the world's oceans comes from cold, dense water sinking in the far North Atlantic.
在某些时期，世界海洋的底层来自遥远的北大西洋下沉的寒冷、稠密的水。
It sews leaves together in the shape of a cup, then it adds a layer of straw to the inside of the cup and lays its eggs there.
它把叶子缝合成杯状，然后在杯子里面铺上一层稻草，在那里产卵。
The Earth's crust is thought to be divided into huge, movable segments, called plates, which float on a soft plastic layer of rock.
人们认为地壳分成了巨大的、可移动的部分，称为板块，这些板块漂浮在柔软可塑的岩石层上。
Even an avalanche of light power can be dangerous, but the Peruvian catastrophe was particularly terrible because it was caused by a heavy layer of ice.
即使是光能的雪崩也可能是危险的，但秘鲁的灾难尤其可怕，因为它是由厚厚的冰层造成的。
Scientists first identified this impact in 1980 from the worldwide layer of sediment deposited from the dust cloud that enveloped the planet after the impact.
1980年，科学家首次在从尘云中沉淀下来的全球范围的沉积层中识别出这种撞击，这些尘云在撞击后围绕着地球。
The explanation may be in Earth's mantle, the layer of rock underlying the tectonic plates and extending down over 1,800 miles to the outer edge of Earth's iron core.
解释可能是在地球的地幔中，这是在构造板块下面的岩石层，向下延伸超过1800英里到地球铁芯的外边缘。
Afterwards during the season of subsidence, the water would subside, or recede, revealing a new layer of fertile black silt and allowing for the planting of various crops.
在随后的沉降季节，水会退去，并露出一层新的肥沃的黑色淤泥，可以在这上面种植各种作物。
First produced in a lab back in 2004, graphene is essentially a single layer of pure carbon atoms bonded together in a honeycomb lattice so thin it's actually considered two-dimensional.
石墨烯最早在2004年诞生于一个实验室，本质上是一层由纯碳原子组成的蜂窝状晶格层，薄到竟被认为是二维物质。
It wasn't until 1906 that a scholar came across the prayer book in a library and realized it was a palimpsest, and that the underlying layer of texts could only have come from Archimedes.
直到1906年，一位学者才在图书馆偶然发现了这本祈祷书，并意识到它是一本重写本，而且底层的文本只可能出自阿基米德之手。
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