一层

A photochromic material, for example, changes its color in relation to the amount of ultraviolet radiation on its surface.

比如，热电材料实际上就是由包括一层半导体材料在内的几层不同材料组成的。

Rimal Armor - A defensive shield created by molding Kojima particles into a sustained, stable flow around the AC's exterior which is capable of greatly diminishing or entirely nullifying a wide variety of attacks.

A装甲，是在将Kojima粒子规律成稳定，持续的粒子流之后，在AC外部产生的一层防御罩。这层罩可以大幅度减轻，或者完全无效化众多不同种类的武器的攻击伤害。

The results show that the secretory ducts are schizogenous cavity which are only distributed in the stem and the leaf.The initial of the secretory duct drives from the ground meristem.

结果表明，分泌道为裂生腔隙，只分布于茎和叶中；分泌道原始细胞起源于基本分生组织；分泌道原始细胞团裂隙的扩大靠鞘细胞的插入和上皮细胞自身的切向伸长；成熟的分泌道呈圆形或椭圆形，由一层上皮细胞和其外的1 ～2 层鞘细胞包被。

Over the flap is a layer which overlaps it on each severable side with a portion having permanently-tacky adhesive.

折片上方是一层膜层，其在每个断续侧边处通过具有永粘性粘结剂的部分覆盖住折片。

A second layer of loose-fitting skin wraps the glass duct-skin, registering the pleats and shrouding the building.

在玻璃管道墙的表面还有一层较为疏松的覆层，作为那些管道的固定装置和大楼外墙装饰。

A mode of the directionally growth of PAn on the surface of NaFe〓P〓rod-like particle was suggested. Some of aniline molecules in the reactants are fixed on the surface of skutterudite particles before the beginning of the polymerization. Other aniline molecules link with the aniline molecules fixed on the surface of skutterudite and form liner chains when the initiater is added into the reactants.

提出了聚苯胺在棒状方钴矿NaFe〓P〓材料表面定向生长的物理化学模型：在表面配位键的作用下方钴矿晶须表面首先附着了一层苯胺单体，在引发剂的作用下溶液中的苯胺分子在这层单体上定向聚合，形成了定向聚苯胺线性分子。

The myocardium beneath the endocardial surface at the top demonstrates pale fibrosis with collagenization following healing of a subendocardial myocardial infarction.

在心肌层下表面上覆盖一层灰白色胶原纤维，这显示心内膜下心肌梗死愈合。

Desert pavement commonly occurs on the three soil site surfaces, which is composed of pebbles and fragments formed slowly in typical desert zone. Many pebbles are subround and variegated.

土壤学特征：1三个土壤地点的地表都有一层砾石层平铺在土壤的表面，称之为漠境砾幂。

In this paper, those teleseismic records with clear P waveforms are chosen to carry out receiver function analysis and modeling. A simple crustal structure model beneath the station is obtained, in which the Moho depth is 28 km. On the top of the upper crust is a 2 kmthick low velocity layer with a shear wave velocity of only 23 km/s. The shear wave velocity increases gradually with depth to 38 km/s in the lower crust.

本文对具有清晰P波波形的远震记录进行了接收函数处理和计算模拟，得到台站下简单的地壳结构模型，其莫霍面深度为28 km，上地壳顶部有一层2 km厚的低速层，横波速度只有23 km/s，向下逐渐过渡到横波速度为38 km/s的下地壳。

Any of numerous flatworms of the class Trematoda,including both external and internal parasites of animal hosts,that have a thick outer cuticle and one or more suckers or hooks for attaching to host tissue.

吸虫任一种吸虫纲的扁平蠕虫，包括以动物为寄主的各种生长于内部和外部的寄生虫，其外部有一层很厚的角质层，长有一个或多个吸口或钩子。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。