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。
After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听到问题后，必须从A、B、C、D四个选项中选出最佳选项。
For each of them there are four choices marked A, B, C and D. You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre.
每题都有对应标记的A、B、C和D四个选项，请选择最佳选项并在答题卡2的相应字母中间划横线。
There are a number of vitamins that are vital for good hair health, the main ones being vitamins C, D and E, and in a balanced diet all these vitamins should be readily available.
有许多对头发健康至关重要的维生素，主要有维生素C、D和E，而在平衡的饮食中所有这些维生素应该很容易获得。
Let them remember how they took to the streets on a warm, clear night in Boston or D. C. or Philly, even the small college town of Newark, Delaware.
让他们记得他们是如何在一个温暖，晴朗的夜晚走上波士顿，华盛顿或者费城，即使只是在特拉华州的纽瓦克市上的小小大学城。
When I started 25 years ago at a little studio in Washington, D. C. , I never thought it would ever last this long or come to this.
25年前，当我在华盛顿的一个小小的演播室开始，我从未想到这个节目会做的这么长，也不会想到这档节目能达到今时今日的地位。
For a recent assignment to photograph "summer in D. C.," I rode around the National Mall on a bicycle searching for images.
为了最近的任务去拍摄“华盛顿的夏天”，我骑着自行车在国家广场周围寻找摄影的对像。
Walsh had flown in this morning from D. C. He sat behind the conference table next to a portable tape recorder and two microphones.
沃尔什一大早就从哥伦比亚特区坐飞机过来了，他坐在会议桌旁，手边有一台便携式磁带录音机和两个麦克风。
Meanwhile, Washington, D. C. — where Congress is debating over whether to pass a climate bill — is getting a memorable preview of what new computer models are predicting.
同时华盛顿特区-国会正在争辩是否通过气候法案，针对新电脑模型所预测的资料进行审核，这审核将更具意义。
Andrew Thomas, a mailroom worker for a Washington, D. C., law firm, had hoped to take his two children to see his grandmother in North Carolina.
安德鲁·托马斯，一家位于华盛顿特区律师事务所的收发室工作人员，曾期望他的两个孩子看到他在北卡罗莱纳州的祖母。
Read about oatmeal ice cream from Washington, D. C. , and how to throw a lunch-lady potluck when the kids go back to school, or learn how to make grilled corn with chili-lime butter — yum.
你可以找到华盛顿市燕麦片冰激凌的做法，学到怎么给从学校回来的孩子做一顿午餐小姐式的家常菜，还可以学怎么做酸辣黄油烤玉米——呀，实在太好吃了。
Figure 3: Performance TAB shows you a letter grade (a, b, c, d, f) and a percent grade (1-100).
图3：性能标签使用字母(A,B,C,D,F)表示等级以及当前等级(1- 100)。
A: Scientists have identified five unique hepatitis viruses, identified by the letters a, b, c, d, and E. While all cause liver disease, they vary in important ways.
答：科学家们已经识别出五种截然不同的肝炎病毒并以甲、乙、丙、丁、戊型作为辨识。虽然它们都会引起肝病，但在重要方面又有所不同。
"I got a plan c, d, E. I got welding, masonry, carpentry, maybe computers," he says.
“我有其他计划，包括学习焊接，泥瓦工，木工，也许还有电脑什么的，”他说。
Scientists have identified five unique hepatitis viruses, identified by the letters A, B, C, D, and E. While all cause liver disease, they vary in important ways.
科学家们已经识别出五种截然不同的肝炎病毒并以甲、乙、丙、丁、戊型作为辨识。虽然它们都会引起肝病，但在重要方面又有所不同。
Photo: a pair of sisters dressed as a grape and a carrot pass out plates to Senate staffers in Washington, D. C., with a message urging them to pass a nutrition bill.
图：华盛顿特区，一对身穿葡萄服和胡萝卜服的姐妹向参议员分发盘子以传递督促他们通过营养议案的信息。
However, facts A, B, and C are never used again; they were instrumental to the argument because they allowed one to establish D, but once D is established, A, B, and C can be safely forgotten.
然而，A,B和C再也没有被使用到；他们只是辅助性的证明，因为它们被用来建立D，然而一旦D被建立起来后，A,B,C可以被毫无顾虑地忘掉。
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。
Enumerations and numeric ranges: For example, the value of a particular string attribute must be a, c, or D. Another example: the value of a particular numeric must be between 1 and 500.
枚举与数字范围：例如，某个特定字符串属性必须为A、c或者d。再比如，某个特定的数字必须在1至500之间。
The Hyatt Regency Washington D. C. is certainly located near the U. S. Capitol building, but not as near as the hotel website's photo, taken with a zoom lens, indicates.
华盛顿凯悦的确位于美国国会大厦附近，但不像该酒店网站上用变焦镜头拍摄的照片所显示的那样近。
In 2007, the O. e. C. D. reports, about 17 percent of the French were over 65, a relatively low figure for Western Europe.
经合组织2007年的报告指出，在法国大约17%年龄超过65岁的人，相比其他西欧国家较低。
The task executes when it receives business items A and B, or C and D, or B and C as inputs.
任务在接收到业务项A和B，或C 和D，或B 和 C作为输入时，该任务将执行。
B is now distinctly slower than a, c, and d.
b现在明显比a、c和d慢。
Determining the hemisphere is easy: latitude zones a, C, d, e, F, g, h, J, K, l, and m are in the Southern hemisphere, and the rest are in the Northern hemisphere.
这种确定非常简单：纬度区a、C、D、E、F、G、H、J、K、L和m位于南半球，而其余区位于北半球。
To cite just a few examples: Willis Lamb, Julian Schwinger, Eugene Wigner, Richard Feynman, s. Tomonaga, C. D. Anderson, E. Segre, O. Chamberlain and many others.
这里仅仅列举其中的几位：威利斯·兰姆、朱利安·施温格、尤因·魏格纳、理查德·费曼、朝永振一郎、C.D.安德森、E .塞雷格、O .张伯伦以及其他一些人。
D Because if I have equal amounts of a, B, c, and d, that's a lot of entropy of mixing there.
因为如果我们有等量的A,B,C和，那么混合熵会很大。
It's important to have vitamins a and C and d.
维生素a,C和D都很重要。
It's important to have vitamins a and C and d.
维生素a,C和D都很重要。
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