It wasn't until 1906 that a scholar came across the prayer book in a library and realized it was a palimpsest, and that the underlying layer of texts could only have come from Archimedes.
直到1906年，一位学者才在图书馆偶然发现了这本祈祷书，并意识到它是一本重写本，而且底层的文本只可能出自阿基米德之手。
The development of successful data security strategies should not only focus on the underlying layer, but should try to cover all threats.
制定成功的数据安全策略不能仅仅着眼于基础层，而应该尽力覆盖所有威胁。
TOT ("tree of trust") is a simple distributed database with a hierarchical trust system, which uses existing P2P networks as the underlying layer.
是一个简单的分布式数据库，具有一个 分等级的信任系统，其在底层使用现有的P2P网络。
The water evaporates and the salts are left behind, creating a white crustal layer that prevents air and water from reaching the underlying soil.
水蒸发留下盐分，形成白色的地壳层，阻止空气和水进入下面的土壤。
The explanation may be in Earth's mantle, the layer of rock underlying the tectonic plates and extending down over 1,800 miles to the outer edge of Earth's iron core.
解释可能是在地球的地幔中，这是在构造板块下面的岩石层，向下延伸超过1800英里到地球铁芯的外边缘。
The second is for the underlying messaging layer that requires persistence of the internal message data format.
第二种数据存储用于潜在的消息传递层，它需要稳定的内部消息数据格式。
These underlying data access calls are thus consolidated in the data access layer and hidden from the business logic.
这些底层数据调用整合到数据访问层中，对于业务逻辑是不可见的。
Next is the block device drivers layer, which contains the various block drivers for underlying devices.
接下来是块设备驱动器层，它包括针对底层设备的各种块驱动器。
The introduction of business context in this layer enables the delivery of dynamic solution behavior through the reuse (and dynamic services assembly) of the underlying information services.
在此层中引入业务上下文允许通过基础信息服务的重用（和动态服务组装）来交付动态解决方案行为。
The underlying Data layer illustrates how the business data is kept in a separate database instance under full control of the application.
底层的数据层说明了如何在应用程序的完全控制下，在单独的数据库实例中保存业务数据。
Most of the solutions exercising multifactor as well as multi-layer authentication make use of the same underlying network security mechanism.
大多数实现多因素身份验证和多层身份验证的解决方案使用相同的底层网络安全机制。
Despite its advantages, most of the solutions exercising multifactor as well as multi-layer authentication make use of the same underlying network security mechanisms.
尽管多因素身份验证和多层身份验证是有优势的，但是大多数解决方案使用相同的底层网络安全机制实现它们。
The underlying network architecture can be divided into three layers (Device layer, Transport layer, and Control layer) plus the service layer and will be introduced from bottom to top respectively.
基础网络体系结构可分为三个层次(设备层、传输层和控制层)，其上还有服务层，我们将按照从下向上的顺序分别进行介绍。
This means that your application's data access layer will sit above Hibernate and be completely abstracted away from of the underlying data model.
这意味着您的应用程序的数据访问层位于Hibernate之上，完全是从底层数据模型中抽象出来的。
Each LLD provides the interface to the particular underlying hardware but USES the standard set of interfaces to the mid layer.
每个LLD都提供了到特定底层硬件的接口，但所使用的到中间层的接口却是一组标准接口。
They supply a simple layer on top of what the underlying system provides.
它们在基础系统所提供的安全性之上提供一个简单的安全层。
The virtualization layer standardizes the underlying hardware interfaces, so virtual machines can be moved seamlessly across different hardware platforms.
虚拟化层对基础的硬件接口进行规范化，所以虚拟机可以在不同的硬件平台之间无缝地移动。
It may go through part or all of a previous incision, skin, an underlying fatty layer and into the abdomen.
新的手术切口会部分或全部经过以前的手术切口、皮肤、皮下脂肪进入腹部。
Consequently, architectural approaches where the development of a XML message processing layer requires the understanding of each of the underlying service components are inappropriate.
XML消息处理层的开发需要了解每个基础服务组件，因此这种结构方法是不合适的。
The Implementation Layer also performs segmentation and concatenation of messages for the underlying protocol.
实现层还执行用于底层协议的消息分段和并置。
When impactors slammed into the surface of Phoebe, the collisions excavated fresh, bright material — probably ice — underlying the surface layer.
当高速而来的撞击者一头扎进月亮表面时，就掘出了表层以下的新鲜物质——很可能是冰。
Then, after around 5 minutes, the thicker dermal layer of skin shrinks and begins to split, allowing the underlying yellow fat to leak out.
大约5分钟后，较厚的真皮部分开始收缩、开裂，于是位于真皮下层的脂肪开始溢出。
Emulation commonly provides a layer between the VM and the underlying hardware and operating system to create the illusion of the desired platform environment as shown in Figure 1.
仿真通常在VM和底层硬件和操作系统之间提供层以便创建如图1中所示的预期的平台环境的幻想。
The underlying heterogeneity that may exist underneath this information service layer and its related complexity is hidden when required (for example, during runtime).
在信息服务层下面可能存在不同的底层结构和技术，在需要时相关的复杂性会被隐藏起来(比如在运行时)。
As you see in Figure 1, the hypervisor is the layer of software that provides the virtualization of the underlying machine (in some cases, with processor support).
在图1中可以看到，hypervisor是提供底层机器虚拟化的软件层(在某些情况下需要处理器支持)。
In this respect WebSphere Process Server heavily USES the underlying messaging capability, located in the Infrastructure layer.
在这方面，WebSphereProcessServer大量使用了位于基础结构层的基础消息功能。
Web services typically sit on top of an HTTP protocol layer, and the HTTP layer receives a message call as a request and transfers the request to the underlying Web-services layer.
Web服务通常位于HTTP协议层之上，而http层以请求的形式接收到一个消息调用并将此请求传递给底层Web服务层。
The system is decoupled from the underlying infrastructure and therefore easy to get running within any IaaS layer.
由于系统与底层基础设施间的连接是松耦合的，所以它能轻易地运行在任意IaaS层之上。
Surprisingly, precious metals instead appear relatively abundant on the planet's surface and in the underlying mantle layer. [Infographic: Tallest Mountain to Deepest Ocean Trench].
令人惊讶的是，在地球表面和下面的地幔层里贵金属反而比较丰富。
If you've not seen Active Record — the underlying persistence layer in Rails — before, I recommend that you take a look first at this earlier Rails article in the Crossing borders series.
如果以前没有学习过活动记录——Rails底层的持久性层，我建议您先阅读跨越边界系列中以前的这篇Rails文章。
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