| 词汇 | active-layer |
| 释义 | BETA active layercollocation in Englishmeanings of activeand layerThese words are often used together. Click on the links below to explore the meanings. active adjective uk /ˈæk.tɪv/ us /ˈæk.tɪv/ busy with a ... See more at active layer noun[ C ] uk /ˈleɪ.ər/ us /ˈleɪ.ɚ/ a level of material, such as a type of rock or gas, that is different from the material above or below it, or a thin sheet of ... See more at layer Examples of active layeractive layer This suggests that the hydrocarbon contamination did not reach deeply beyond the activelayer, so that most contaminated sites were, in fact, shallow. The activelayer is generally 30- 40 cm thick. The column was subjected to several cycles of top-down freezing and thawing to simulate an activelayer. These were finer than the original sediments that form the top of the activelayer (sandy gravel). Together, equations 14 and 18 allow the value of the thickness of the activelayer () to be determined. The sites where the activelayer had been disturbed were stable several years after the initial disturbance. In these locations, the activelayer water content is very low, sometimes averaging less than 1% through the entire soil profile. At the same time, this is compensated for by the fact that the biomass in the activelayer will grow more rapidly. Curves 1,2-heat sources confined only to the activelayer. In most cases fuel had been contained in the upper part of the activelayer. There were no significant differences between the depth of the activelayer in disturbed and undisturbed sites. In 1996 the sediment moisture content around these cracks was, on average, about double that elsewhere in the activelayer. The activelayer depth is about 35 cm, and the permafrost in the area is dry-frozen. As the freeze-front moves down through the activelayer, the lower part of the unfrozen zone becomes isothermal near the freezing temperature. The 1992 remedial action removed the top of the activelayer, that is, the most contaminated sediments, and replaced them with clean backfill. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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