1·Because of the cold temperatures, the tundra has two layers: top layer, which is called the active layer, is frozen in the winter and spring, but thaws in the summer.
由于寒冷的气温，冻土带有两层：最上面的一层被称为活动层，在冬季和春季被冻结，但在夏季解冻。
2·By organizing data block partition, two layer nested bintree were built.
在数据分块组织的基础上构建了两层嵌套二叉树。
3·The paper constructed a time depth conversion model of plane wave propagation in two layer medium.
本文构造了一种在二层介质中平面波传播的时—深转换模型。
4·Alkali foaming process for two layer print was introduced to resolve the problem during the process.
总结了双层布印花轧碱起泡相应的生产工艺，解决了轧碱起泡的问题。
5·Knife: there are two layer slide (medium and small skateboarding), bed saddle and knife body together.
刀架：有两层滑板(中、小滑板)、床鞍与刀架体共同组成。
6·The features, applications and electromagnetic computing method of single and two layer winding were introduced.
介绍了单双层绕组的特点、应用情况及电磁计算的方法。
7·Based on analyzing H. 263 recommendation, a new scene adaptive video coding scheme which used two layer filter mechanism was proposed.
基于H。 263视频编码标准，提出了一种新的采用二级筛选机制的场景自适应编码方案。
8·The method and main results of qualitative experiment of unsaturated water vadose through two layer porous media is introduced in this paper.
本文主要介绍关于非饱和水在双层孔隙介质中渗流定性实验的方法和主要结果。
9·The paper will set up an experimental system, measure the light distribution in two layer tissue phantoms, and compare the experimental results with the Monte Carlo modeling.
本文拟建立一套实验装置，测量双层生物组织模拟体中的光分布，并将实验结果与理论计算的结果进行了比较。
10·There're two reasons for this: first, they live in the active layer, which, remember, contains water that doesn't penetrate the permafrost.
造成这种情况的原因有两个：首先，它们生活在活动层中，请记住，活动层中包含的水不会渗透永久冻土。