不同成熟度垃圾的上覆土壤中汞都具有次表面样品总汞含量高于表面样品的特点，但变化趋势不同。
Although all sub-surface samples contain higher mercury than surface samples, the contents of Hg in profile soil overlying garbages of different maturities show different trends of variation.
采集建筑材料表面样品对真菌和细菌生长可能性进行评估，采集空气样品来确定可生存真菌和细菌以及不可生存真菌的浓度。
Collect surface samples from building materials to assess fungal and bacterial growth potentials, and air samples to determine concentrations of both viable and nonviable fungi, and viable bacteria.
在样品表面以下的分子通常也是金属的，并且它平滑的相似的电子轨道叠加能够伪装成它上面的分子。
And the surface beneath the sample molecule is usually metal, too, and its smooth, featureless mash of electron orbitals can camouflage the molecule lying on top of it.
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