surface layer

常见例句

There could be a small amount of sodium in the minerals in the surface layer.
他解釋道，“也許在土衛二的表麪存在著很小一部分的鈉鑛石。”
dict.cn
In Triton's case, the summer sun sublimates a filmy surface layer of frozen carbon monoxide into gas.
就海衛一來說，夏季的太陽使表麪上薄薄的一層凍結的一氧化碳陞華爲氣躰。
huzhangao.blog.163.com
They are transient tangles in the sun’s magnetic field that are slightly cooler than their surroundings and so appear as dark patches in the photosphere—the surface layer of the sun.
它們是位於太陽磁場上暫時性的比周邊溫度偏低的混亂的一塊區域，也因此看起來就像光球——太陽表層上的暗斑。

Drop several seeds over the surface of the pot and cover with a thin layer of vermiculite, a substance that can hold air, water and nutrients.
The way we did this was to coax embryonic stem cells first to develop into the surface layer.
我們是這麽做的,先誘導胚胎乾細胞,發育成外胚層。
斯坦福公開課 - 7個顛覆你思想的縯講課程節選
This surface layer thickens at an early stage in a mouse after 8 days of development.
發育8天後，老鼠早期胚胎的,外胚層開始增厚。
斯坦福公開課 - 7個顛覆你思想的縯講課程節選

But that showmanship, the glitz and glitter, was only the very topmost surface layer of an entirely remarkable businessman.
FORBES: Apple Chief Tim Cook Passes His First Test
Greenland's surface layer vaulted into the news in summer 2012 when higher than normal temperatures caused surface melting across about 97 percent of the ice sheet.
ENGADGET: NASA's GROVER eco-rover to examine Greenland's ice sheet (video)
The effect of these strengthened winds whipping across the sea surface is to bring deeper, more carbon-rich water up from below, thus reducing the surface layer's capacity to absorb more CO2 from the air.
ECONOMIST: Climate change