土层

This paper explains that the Winkler's model is applicable only to spongy or compressible rather thin soil bed when calculating the sinkage and internal force of the rig-substructure and in general a model of limited compressibility should be used.

本文以计算结果说明计算钻机底座的沉陷和内力时，文克尔模型仅适用于松软的或可压缩的土层较薄的地基，一般情况下应该用有限压缩层模型，这对钻机底座的静力计算有着重要的意义。

In the profile, soil microbial groups and enzyme activity decreases with the soil depth.

在剖面分布上，土壤微生物类群和酶活性也有明显的层次差异，即随土层的增加而减少。

In the vertical profile distribution of soil aggregate, the MWD diminished with the increasing of soil depth.

在垂直剖面上，MWD随着土层深度的增加而减小。

The soil profile could be characterized by three layers according to beta co...

相同土层深度含水量随海拔高度的增加先升高后降低。4 。

The invention forms a new soil layer structure with the upper part rough and the lower part fine, increases a coarse sand content of upper soil and obviously improves soil tilth; thereby facilitating the leaching of the salt. Only half a year is needed and then the salt content of a plow layer is reduced from six point five four gram per kilogram to one point two three gram per kilogram; thereby speeding up the improvement and utilization speed of the marine solonchak and restraining the uprise of salt.

本发明形成上粗下细的新土层结构，增加了上层土壤的粗砂粒含量，明显改善了土壤耕性；有利于盐分的淋洗，仅需半年时间，耕作层含盐量即可由6.54g/kg降至1.23g/kg，加快了滨海盐土的改良利用速度，并抑制了返盐现象。

Because of thin solum and lower soil loss tolerance,the ecosystem in Karst region is very fragile.The vegetation is difficult to recover after destruction.

喀斯特区由于土层薄、土壤允许流失量低，生态系统十分脆弱，植被破坏后难以恢复。

The most of seeds in the soil concentrated in the 0-5 cm of the soil surface in typical steppe.

种子库内的种子主要集中在0-5 cm的土层中，下面5-15 cm土壤中的种子含量较少。

N\nWhere the Romans recognized metal ores on the surface, they could follow them into the ground by strip-mining the surface ("the debris of undermined mountains"), or digging short tunnels.

n\n当罗马人在地表发现金属矿石，他们会挖开地表，深入土层来追寻这些矿石，或者挖掘一个短的地道。

Then the characteristics of land subsidence of Shanghai in time and space are studied.

分析结果表明：地下水位的变化模式对上海土层的变形有显著影响。

Biotic reclamation of the saline and alkaline land means the direct planting of the salt- enduring plant in salinization land, in conventional irrigation, not to require any subsidiary condition and facilities,in which the soil salinity is retained beyond the root system zone in soil profile.

生物改良盐碱地，指利用耐盐植物直接种植，通过常规灌溉，不需要任何附加条件和设施，将土壤盐分控制在植物根系土层以下的土体中。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失