surface layer

基本解釋

There could be a small amount of sodium in the minerals in the surface layer.
他解釋道，“也許在土衛(wèi)二的表面存在著很小一部分的鈉礦石?！?br>dict.cn
In Triton's case, the summer sun sublimates a filmy surface layer of frozen carbon monoxide into gas.
就海衛(wèi)一來說，夏季的太陽使表面上薄薄的一層凍結(jié)的一氧化碳升華為氣體。
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.
它們是位于太陽磁場上暫時性的比周邊溫度偏低的混亂的一塊區(qū)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.
我們是這么做的,先誘導(dǎo)胚胎干細(xì)胞,發(fā)育成外胚層。
斯坦福公開課 - 7個顛覆你思想的演講課程節(jié)選
This surface layer thickens at an early stage in a mouse after 8 days of development.
發(fā)育8天后，老鼠早期胚胎的,外胚層開始增厚。
斯坦福公開課 - 7個顛覆你思想的演講課程節(jié)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

表層
TIG surface treat process eliminated column gain structures of surface layer of welds. The size of acicular ferrite was greatly refined and grain boundary ferrite and side-plate ferrite disappeared.
而氬弧加熱處理使焊縫表層的柱狀晶消失，針狀鐵素體晶粒明顯細(xì)化，并消除了對性能有害的組織-晶界鐵素體和側(cè)板條鐵素體。
表面層

表層
The facultative anaerobic strain,H-2,was screened and isolated form the soil 80 cm depth from the surface layer at Zoige alpine wetland in Qinghai-Tibetan Plateau.
自青藏高原若爾蓋高寒濕地距離表層80 cm深處的土壤中分離篩選到一株具有高纖維素分解活性的兼性厭氧菌株H-2。
表面層