Three other types of airspace, Classes D, C and B, govern the vicinity of airports.
其他三种领空，D、C和B类，管理着机场周围地区。
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。
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。
By mid-July, there could be four ships taking on oil, with a combined capacity of maybe 80, 000 b/d.
到七月中旬，将有四艘钻油船，每日累计输油量约为8万桶。
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。
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。
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。
Theodore and Franklin D. Roosevelt, William Howard Taft, Dwight D. Eisenhower, Lyndon B. Johnson, Gerald Ford, and George H. W. Bush all had offices in this building before becoming president.
西奥多、富兰克林·罗斯福、威廉·霍华德·塔夫脱、德怀特·艾森豪威尔、林登·约翰逊、杰拉尔德·福特和乔治·布什在成为总统之前，都曾在这座大楼里就职。
Theodore and Franklin D. Roosevelt, William Howard Taft, Dwight D. Eisenhower, Lyndon B. Johnson, Gerald Ford, and George H. W. Bush all had offices in this building before becoming president.
西奥多、富兰克林·罗斯福、威廉·霍华德·塔夫脱、德怀特·艾森豪威尔、林登·约翰逊、杰拉尔德·福特和乔治·布什在成为总统之前，都曾就职于这座大楼里。
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。
Oil production from Daqing peaked at about 1.1m barrels per day (b/d) in 1997.
大庆的石油产量在1997年达到峰值——每天110万桶（b/d）。
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)。
It's also potent in antioxidants and vitamins B and d.
而且野生鲑鱼中还富抗氧化物以及维生素b、D。
D o 'b: I called him about three minutes after seeing 43 Folders.
DO'B：当我看到了他的43个文件夹时就立即联系了他。
“They're learning the physical skills of dentistry from the very beginning,” said Dr. John B. D. Featherstone, dean of the UCSF School of Dentistry.
“他们正从最初的动手能力学起，“约翰·费瑟斯通说，他是UCSF牙科分校的院长。”
Milk contains essential nutrients like Calcium, Potassium, Protein, Vitamins a, B-12, d, Niacin, Phosphorus and Riboflavin.
牛奶含有的基本营养素有钙，钾，蛋白质，维生素a、B12、D，烟酸，磷，核黄素等。
That is even more expensive than it sounds, because each well produces only a small amount: perhaps 180 b/d, compared with as much as 7, 000 b/d from some Persian Gulf wells.
而这实际上比它听起来要昂贵的多，因为每个油井只能产很小一部分数量的石油：大约180桶／天，而与之相比，波斯湾的油井的日产量为7000桶／天。
Michael replies, "I seem to remember several conversations that ended with 'I am not d."b..
Michael回答，“我好像还记得我们几段对话的结尾你都说‘我不是D .B .Cooper’。”
D o 'b: Merlin and I have a couple of mini-projects that should see the light of day soon. And it's always fun to see what's happening in this field.
DO'B：Merlin和我有很多微小的项目即将面世了，而且看着这个领域里正在发生的一切是那样的快乐。
Of that, some 1m b/d is sold at subsidised prices at home or to regional allies, leaving just 1.25m b/d for full-price exports.
还有，每日约100万桶石油在国内或区域联盟国中以优惠价格卖出，因此每日只剩下125万桶石油是以全价出口。
World demand grew by an extraordinary 2.7m b/d in 2010, according to the International Energy Agency.
依照世界能源署的数据，2010年里世界的需求每日额外增加270万桶。
The shutdowns bring the total volume lost so far to at least 350,000 b/d, or about 22 per cent of Libya’s production and equal to Greece’s demand.
迄今为止，上述停产已导致利比亚的石油日产量下降了至少35万桶，相当于该国总产量的22%或整个希腊的需求。
Average extractions costs there will increase from just over $12 a barrel in 2011 to more than $15 in 2035, as production increases by more than 17m b/d.
随着每天增加1700万桶产量，平均炼油成本从2011年的12美元每桶上升到2035年的超过15美元每桶。
Saudi Arabia increased oil production by 700, 000 barrels a day last month, to reach a total of 9.7m b/d, according to the International Energy Agency.
据国际能源署称，上个月沙特阿拉伯把每天的产油量增加到了每天70万桶，达到了9.7mb/d。
The IEA reckons that OPEC has no more than 2m barrels per day (b/d) of spare capacity—just over 2% of global demand.
IEA估计欧佩克的剩余产油能力不多于每天200万桶—这仅仅是全球需求总量的2% 。
The IEA reckons that OPEC has no more than 2m barrels per day (b/d) of spare capacity—just over 2% of global demand.
IEA估计欧佩克的剩余产油能力不多于每天200万桶—这仅仅是全球需求总量的2% 。
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