| 词汇 | substratum |
| 释义 | substratum noun[ C ] uk /səbˈstrɑː.təm/ us /səbˈstræt̬.əm/pluralsubstratauk /səbˈstrɑː.tə/ us /səbˈstræt̬.ə/ substratumnoun[C] (LOWER LAYER)geology specialized a layer of rock, soil, or similar material that is below another layer: 底土层;底土，心土 A substratum of clay kept moisture close to the topsoil.底土层的黏土使水分保持在表层土附近。 They planned to sink over twenty-five deep boreholes into the ground to assess the substrata.他们计划在地下钻二十五个深井以评估底土层。 a part or layer of something that is below another part or layer: （位于一层物质下面的）底层，下层 Apply a substratum of lash powder and then quickly seal with a stroke of mascara. 涂一层睫毛粉打底，然后迅速用睫毛膏封住。 "Underclass" is used by sociologists to mean a substratum of society somewhere below the working class.社会学家用"下层阶级"来指比工人阶级低的社会底层。 The spade dug up three inches of black soil with a substratum of yellow mud and clay. The rich alluvial soils provide an ideal substratum for growing rice. The Valmiki community is a substratum of the Dalit caste. There's a whole substratum of administrative positions. Coverings and layers a blanket of somethingidiom beeswax wrap blanket brazen casing diaphragm interstratify lagging lamella lamellar lamellate seam sheath shellac space blanket strata stratum superstratum uncover varnish substratumnoun[C] (BASIS)something important from which something else develops, but that is not immediately obvious: 基础，本源；赋予属性的东西 There is a broad substratum of truth in what she says.她所说的话有广泛的事实基础。 Would a jury conclude that a sufficient factual substratum existed for the comment?陪审团是否会得出结论，认为评论存在足够的事实基础？ Many of the ancient mythical tales have a substratum of historical fact. There was a substratum of good feeling in her. The novel has a solid substratum of well-conceived minor characters. Being based on or depending on something -based as the case may bephrase base something on something bases basis dependently divine right entail footing found ground rest on/upon something rest with someone result from something ride ride on something/someone rooted strength understanding wake Examples of substratumsubstratum Eels were sampled in the main stream at both sites which were similar in flow rate, stream width and substratum. It is this substratum-superstratum tension that produces (38). Other faults or fractures in the substratum not colonized by bacterial growths were observed. The substratum of this experience is the mastery of a technique. The substratum bands are entirely attributable to a-quartz, owing to its strong scattering ability. The powder identified as calcite in a fracture line of the substratum we believe originated from the penetration of calcareous deposits in ground water. In contrast, exterior surfaces exposed to lower relative humidity and substratum water contents, supported less abundant (biomass) biofilms. The lower boundary of the array is designated the "substratum" on which certain cells can attach. A few trypanosomes adapt to in vitro conditions by attaching to the substratum or to cells growing from the explant. The dark patches visible in the images are the polystyrene substratum. First, outside of contact situations, there is no substratum with which universal tendencies might converge. In this case, what we find in the affidavit is a combination of a superstratum-induced and subsequent substratum-induced change. Soil samples were mixed with a sterile substratum of vermiculite and peat (2:1) until a depth of 1 cm was reached. The substratum reduplication is subject to the normative circumscription by the properties of the superstratum reduplication. Direct influence of the substratum languages is the second type of explanation. 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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