Teeth have a hard surface layer called enamel.
牙齿有一层叫做釉质的坚硬表层。
In 1664 Hooke observed a reddish spot on the surface of the planet.
1664年，胡克观察到了那颗行星表面的一个微红的斑点。
As the water evaporates, a crust of salt is left on the surface of the soil.
水蒸发后，土壤表面留下一层盐。
Ozone forms a protective layer between 12 and 30 miles above the Earth's surface.
臭氧在距地球表面12至30英里的地方形成一个保护层。
When a surface is perpendicular to the rays, their intensity is at its maximum.
当表面与射线垂直时，射线的强度最大。
Her eyes opened wider and she contemplated the sea-green figured velvet, the shining brass, silver, and glass, the wood that gleamed as darkly brilliant as the surface of a pool of oil.
她的眼睛睁得更大了，她凝视着海绿色的有花纹的天鹅绒，闪闪发光的黄铜、银和玻璃，还有像油池表面一样暗亮的木头。
From a food safety standpoint, if you have millions or more bacteria on a surface, 0.1% is still enough to make you sick.
从食品安全的角度来看，如果表面有数百万或更多的细菌，其中0.1%的量就足以让你生病。
From a food safety standpoint if you have millions or more bacteria on a surface, 0.1% is still enough to make you sick.
从食品安全的角度来看，如果食物表面有数百万或更多的细菌，食用0.1%也足以让你生病。
The evaporation from the leaf surface causes a constant compensatory suction of water.
叶片表面的蒸发作用产生了持续的代偿吸水性。
By extracting water from the detector's chamber, the detector's surface becomes a concave hemisphere.
通过从探测器的舱室中提取水分，探测器表面形成一个凹半球。
The probes have also made the scientists think that under its surface, Europa has a rocky core giving off volcanic heat.
这些探测器还让科学家们认为，在木卫二的表面之下，有一个释放出火山的热量的岩石内核。
Canadian geophysicist Tuzo Wilson realized that this age progression could result if the islands were formed on a surface plate moving over a fixed volcanic source in the interior.
加拿大地球物理学家 Tuzo Wilson意识到，如果一块在内部固定火山源上移动的表面板块形成了岛屿，就会导致岛屿年龄增加。
From a food safety standpoint, if you have millions or more bacteria on a surface,0. 1% is still enough to make you sick.
从食品安全的角度来看，如果一个东西表面上有数百万或更多的细菌，那它们当中的0.1%都足够让你生病了。
"It is still difficult for a biped robot to walk on a bumpy surface, even on Earth," the official said.
“即使在地球上，两足机器人也很难在崎岖不平的地面上行走。”这位官员说。
When a reservoir is sufficiently large, a sphere of this hot rock forces its way up through the upper mantle to Earth's surface, creating a broad bulge in the topography.
当储层足够大时，这种炽热岩石的一个球体强行通过上地幔上升到地球表面，在地形上形成一个宽阔的隆起。
The surface mark of an established plume is a hot spot—an isolated region of volcanoes and uplifted terrain located far from the edge of a surface plate.
一个已形成的烟羽的表面标志是一个热点——一个远离表面板块边缘的火山和隆起地形的孤立区域。
I bobbed to the surface and gasped a lungful of air.
我浮上水面，深吸了一口气。
The air was so still that there was hardly a ripple on the pond's surface.
没有风，池塘的水面上几乎看不到波纹。
It seems like a good idea on the surface but there are sure to be problems.
这主意乍一看不错，但肯定存在问题。
When an underwater volcano pushes submerged rock to the surface, a new island is created.
当海底火山将水下的岩石推到表面时，一个新的岛屿就形成了。
In some cases, the loose soil is blown completely away, leaving a stony surface.
在某些情况下，松散的土壤全部被风吹走，只剩下石质化的表层。
If the former are greater, the lake is a surface-water-dominated lake; if the latter, it is a seepage-dominated lake.
如果前者较大，这个湖就是一个以表层水为主的湖泊；如果是后者，则是一个以渗漏为主的湖泊。
Raffles' pitcher plant, from the jungles of Borneo, produces nectar that both lures insects and forms a slick surface on which they can't get a grip.
莱佛士的猪笼草来自婆罗洲的丛林，它产出的花蜜既能吸引昆虫，又能形成一个光滑的表面，让昆虫无法找到着力点。
Leaves that have tons of tiny hairs, like a fern, can hold spherical water droplets in focus above a leaf's surface.
拥有大量微小绒毛的叶子，如蕨类植物，可以将球形水滴聚集在叶子表面。
Even though one or two degree Celsius rise in sea surface temperature for a relatively short amount of time can cause bleaching.
即使海面温度在短时间内升高一到两摄氏度，也可能会引起褪色。
When surface temperatures rise to a comfortable threshold, they emerge.
当地表温度上升到一个舒适的阈值时，它们就会浮现。
Surface acting is a prime example of "emotional labor," a concept that the writer Jess Zimmerman made familiar in a 2015 essay.
表面行为是“情绪劳动”的一个典型例子，作家杰西·齐默尔曼在2015年的一篇文章中让人们熟悉了这一概念。
My father is a man of few words, but somewhere deep beneath the surface of him lies a caring character.
我的父亲是一个少言寡语的人，但是在其外表之下内心深处的某个地方保留着关爱他人的品格。
The water is brought to the surface, as a liquid or steam, through holes drilled for the purpose.
水通过特意钻的孔，以液体或蒸汽形态被带到地表。
A fingerprint is formed when a finger touches a surface.
当手指接触一个表面时就形成了指纹。
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