凍土地帶 的英文怎麼說

Roll over protective structure ( rops ) is a device which installs on out of construction vehicle. the main functions are : when the vehicle rolling over. rops can prevent the vehicle from rolling over further, and reduce the possibility of rolling vehicle injures operator ; when the vehicle traveling on freezing soil. concrete and rock, it has large resist continuous impact ability ; when the vehicle overturning rops can support the whole vehicle. arrangement of falling object protective structure ( fops ) can block objects ( such as trees, rocks ) so that supply protection for operator. this problem is that research rolling over and falling objects protective structure of bulldozer by learning research condition of rops / fops and relative lay down international standard. on the base of theory analysis. detrudes counting formula of rops / fops deformation through founding mechanics analysis model of rops / fops at the stage of elasticity and plastoelastic. and finds a set of feasible nonlinear finite element analysis counting. lt calculates rops / fops plastoelastic deforma variable of 320hp bulldozer, bulldozer has been carried out by optimizing design method

其主要功能是：當車輛滾翻時， rops能刺入未凍土壤而阻止車輛的進一步滾翻，降低滾翻的車輛對系著安全帶司機軋傷的可能性；保證rops在碰撞和沖擊變形不大的地面（如凍土、混疑土上、巖石）時，能具有相當大的抗連續沖擊能力；當車輛已經處于顛覆狀態時，已經變形的rops應能支撐住整車。落物保護裝置（簡稱fops ） ，其構件的布置方式要能遮蔽墜落的物體（如，樹木、巖石等） ，以便對司機提供適當的保護。本課題主要通過了解國內外有關對rops fops的研究情況和有關國際標準的制定，對大型推土機傾翻和落物保護裝置進行研究，在理論分析的基礎上，通過建立rops fops的力學分析模型，推導彈性、彈塑性階段rops fops變形的計算公式，建立一套可行的rops fops的非線性有限元分析計算方法。

The two tremendous continental countries shared a frontier of 4, 000 miles in a vast arc from the frozen tundras of siberia to the stark deserts of central asia.

這兩個遼闊的大陸國家的共同邊界從西伯利亞凍土地帶到中亞細亞荒漠劃出一個大弧形，長達四千多英里。

On four legs, they resemble the great timber wolves that make the tundra their home

當他們四足的時候，象來自凍土地帶的森林巨狼。

This paper analyzes on some factors influencing the water accumulation during the soil freezing process, probes into the mechanism of the water and salt migration during the process of water accumulation, and points out that the water accumulation of frozen zone provides the effect of water and salt migration for the hibernating propagation of the forest in the seasons of winter and spring

分析了土壤凍結過程中水分積聚的影響因素，探討了水分積聚過程中水鹽遷移的機理，指出凍結帶水分積聚為冬春季林木越冬繁衍提供了水分，同時鹽分也隨水分遷移到地表。

Everything, pretty much, tastes like the mosses of tundra, dug up in mid - winter

這些東西，有相當多一部分，嘗起來就像深冬季節挖出的凍土帶的地衣。

This article analyzes the characteristics of permafrost earth, establishes mathematical model of earth thermal transfer, which consists of thermal transfer equation in thaw zone, the conservation relationship of heat quantity transferring from pipeline to earth and from earth surface to atmosphere, earth temperatures at thaw zone interface, heat transfer condition of solid phase changing into liquid phase at phase interface

文章分析了永凍土的特點，建立了永凍土地帶土壤傳熱數學模型：融化圈內外傳熱方程、管道向土壤和土壤表面向大氣所放熱量的守恆關系、融化圈界面處土壤溫度、相變界面處固相變為液相的傳熱條件。

When a buried pipeline goes through permafrost zone, thermal action between medium in pipeline and permafrost occurs and causes the frozen earth thawing, so the thaw settlement forms around the pipeline

摘要埋地油氣管道通過永凍土地帶時，由於管內介質與周圍的凍土發生了熱力作用，使冰土解凍，在管道周圍形成融化圈。

Taking an oil pipeline passing through permafrost as an example, the paper calculates and analyzes the positions and magnitudes of various maximum stresses, then put forwards the measures of reducing thermal deformation of pipeline in permafrost zone

還建立了理地管道模型，並以穿過永凍土地帶土壤的輸油管道為例，分析並計算了各種應力的最大值所在的位置和大小，提出了在永凍土地帶減小管道熱力變形的措施。

Their coats are varying shades of gray so that they fade like ghosts into the forest

當他們四足的時候，象來自凍土地帶的森林巨狼。

A third of this vast region, the world ' s biggest patch of frozen ground, is covered with lakes that are growing as subterranean ice melts

隨著地下冰層的溶化，這個世界上最大的凍土帶有三分之一的地區被這樣的湖水覆蓋，而且湖水的水量在不斷增長。