In the A, B, C, D and F grading system, the first four letters are typically considered passing grades.
在A、B、C、D和F评分体系中，前四个字母通常被认为是及格。
The system is composed of industrial PC, DMC300 motion controller, discharge status checking card, A/D card, I/O card and pulse power.
该系统由工业PC，DMC300运动控制器，放电状态检查卡，A/D 卡，I/O 卡和脉冲电源组成。
Vitamin D strengthens the bone and musculoskeletal system.
维生素D可增强骨骼和肌肉骨骼系统。
D — When a participant chose the earlier reward, there was an increase in the activity of his limbic system.
当一个参与者选择了先期报酬时，他的大脑边缘系统活动增强了。
There probably is a risk to having too much vitamin D in the system.
可能会发生系统里存在过多维生素d的风险。
The Royal Thai Air Force has procured an integrated air defence system with Gripen C/D, the ERIEYE airborne early warning system and a Command and Control C2 system including data link communication.
泰国皇家空军已经向瑞典购买了一套综合防空系统，包括鹰狮C/D战斗机、“爱立眼”机载早期预警系统和包含数据链通信的指挥控制C2系统。
The -d option defines the system properties.
d选项用于定义系统属性。
If a professional grading system existed, executives would never settle for a D- in their careers.
如果有专业的分级制度，经理人们永远不会满足于在职业生涯中获得D。
For example, if the MySQL application were to be started (such as system startup), it would be invoked as /etc/rc2.d/S20mysql start.
例如，如果要启动MySQL应用程序（例如系统启动），可以这样调用：/etc/rc2.d/S20mysqlstart。
In some ways it's not surprising that many repeat visitors to the Ed are already connected to the mental health system, said Dorothy Stubbe, M. d.
从某种角度来说，许多多次进入急诊室的就医者已经与心理卫生保健系统取得联系并不值得惊讶——医学博士DorothyStubbe在一次采访中说。
If your system supports the graphics display, remove the — nodisplay option for an excellent 3-d visualization of the sound input.
如果系统支持图形显示，请删除——nodisplay选项以获得声音输入的优秀3 - d视觉效果。
You can create links to particular users in messages by entering @ followed by their user name or send private 'direct messages' through the system by typing d and the user name.
你可以在信息中创建特殊用户链接，只要输入@再加上他们的用户名，也可以通过输入“d”加用户名通过系统发送私人“直接消息”。
In an environment with WebSphere security enabled, you will also need to make provisions for the CSIV2 and SAS addresses (c, d, e), depending on your application and system requirements.
在启用了WebSphere安全性的环境中，您还将需要提供CSIV2和SAS地址(c、d、e)，取决于您的应用程序和系统需求。
One of the several planets within the Gliese 581 star system, called Gliese 581 d, may be one of the most potentially habitable alien worlds known.
一颗在格利泽581恒星系统内的叫做格利泽581d行星，可能是已知的最适于居住的外行星。
These are analogous to files like /etc/rc.d/rc3.d/S12sshd on a more conventional Linux system.
这些文件与常见的Linux系统上的 /etc/rc.d/rc3.d/S12sshd 文件类似。
The -d switch compares the contents of the archive to current files on a system.
d开关将归档文件的内容与系统上的当前文件作比较。
One final very useful option for du is -d, which prevents du from following file system boundaries.
du命令的最后一个非常有用的选项是- d，该选项可以防止du命令超过文件系统边界。
D-BUS is a lightweight yet powerful remote procedure call system with minimal overhead costs for the applications that wish to use it.
D - BUS是一个轻量级但是很强大的远程过程调用系统，为希望使用它的应用程序带来最小的开销代价。
You can also use the -d switch to display each system call with a time delta, representing the elapsed time in seconds since the last event.
还可以使用- D开关显示每个系统调用的时间差，时间差表示自前一个事件以来流逝的秒数。
The second part of a spatial reference system is its projection, which defines how to lay out the Earth surface onto a 2-d surface.
空间引用系统的第二部分是投影，它定义了如何将地球表面放置在2 - d平面上。
The Free-Range Resonant Electrical Energy Delivery System, or FREE-D, is powered by induction.
这种无线谐振电能传输系统——FREE - D是通过电磁感应传输能量的。
The Tories will keep at least part of the current system of tax credits for research and development (R&D).
保守党至少会保留当前部分税收抵免机制。
The coordinate system, for 2-d graphics, is shown in Figure 2.
2 - D图形的坐标系如图2所示。
In short, vector data take the simplest topological entities — points, lines, and polygons — and anchor them within a 2-d Cartesian coordinate system to describe geographical features.
简言之，矢量数据利用最简单的拓扑实体—点、线和多边形，并在二维笛卡尔坐标系统中固定它们来描述地理特征。
During a backup to a directory file system, you should specify the -d option to turn off ontape interactive prompts.
在将数据备份到一个目录文件系统的过程中，应该指定- d选项，以关闭ontape交互式提示符。
Even though d-i is not stable yet, system administrators deploying Debian might be interested in what the new release will bring them.
尽管d - i还不稳定，但部署Debian的系统管理员们可能会对这次发布的新东西产生兴趣。
Even though d-i is not stable yet, system administrators deploying Debian might be interested in what the new release will bring them.
尽管d - i还不稳定，但部署Debian的系统管理员们可能会对这次发布的新东西产生兴趣。
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