so study and control the noise of locomotive cab is very necessary.

there is no air-condition system in locomotive cab for a long time, and motorman's working conditions is abominable.

摘要长期以来，机车司机室没有空调系统，司机工作条件恶劣。

locomotive cab applied ergonomic principles of design, structure, decorated with all-inclusive environment, elegant and easy to manipulate.

机车司机室应用了人机工程学原理设计，采用全包结构装饰环境优雅、操纵方便。

ross, joey, and chandler go on a ride-along with gary;

罗斯、乔伊和钱德一起坐在盖瑞的警车上去巡逻；

whenever i go on a ride, i'm always thinking of what's wrong with the thing and how it can be improved.

不管什么时候，只要我搭乘一个游乐设施，我总是会想这个设施有什么问题，怎么去改进它。

before directional, experienced player won't eat the touch, because doing so is likely to fall into a wrong path "" .

定向之前，有经验的牌手是不会随意吃碰的，因为这样做很可能“误入歧途”。

retrieves the current position of the pen (in logical coordinates).

获取笔的当前位置（以逻辑坐标表示）

the logical coordinates are the offsets as they would be if the pixels themselves were scaled.

逻辑坐标是像素本身经过缩放后将出现的偏移量。

the list may also include static items, such as logical group titles.

此列表还可包括静态项，如逻辑组标题。

stream: a logical group of model files.

流：模型文件的逻辑组。

a domain is a logical group of users and resources under the control of one server, called the primary domain controller (pdc).

一个领域是指由使用者及资源所组成的一个逻辑群组，该群组被一台称为主要领域伺服器（PDC）所控制。

if you do disable autocommit, you must execute an explicit commit after each logical group of commands.

如果您禁用了自动提交，则必须在每个逻辑命令组后执行一个显式提交命令。

the modules you define will create a logical group and liberal use of modules will prevent pollution of the global namespace.

您定义的模块将创建一个逻辑组，模块的自由使用防止了全局名称空间的污染。

a logical group of nodes that are combined to allow for a single point of administration.

组合到一起可以单点管理的节点构成的逻辑组。

example 3: you want to extract the metrics captured for each service class in the scstats logical group into a relational table.

示例3：您想将为SCSTATS逻辑组中每一个服务类捕获的指标提取到关系表中。

each tier defines a logical group of software modules that can be mapped to a physical piece of hardware.

每个逻辑层都定义了一组软件模块，它们可以映射到硬件的物理部分。

general purpose optical cable connector

通用光缆连接器

high performance optical cable connector

高性能光缆连接器

optical cable connector with focusing junction

有聚焦结的光缆连接器

optical cable connector without focusing junction

无聚焦结的光缆连接器

optical diagnostics in rarefied flows

稀薄流中的光学诊断法