While this limitation may be removed in a future release, keep this limitation in mind as this is a fundamental operation for Ruby on Rails migrations.
尽管未来的DB 2版本中可能会取消这个限制，但是现在要记住这个限制，因为这是Rubyon Rails迁移的一个基本操作。
The Afghanistan operation was quite the opposite — highly sophisticated and devastating, with vast implications for both the war in Afghanistan and future clandestine CIA operations.
（美军）在阿富汗的行动却正好相反—非常复杂而令人沮丧，强烈暗示着阿富汗战争和CIA在阿富汗秘密行动的未来—以迪克。
Asynchronous in this case means "punt my IO operation to a built-in thread pool", with subsequent code checking on the status of those operations and getting results from a "future" handle.
在这里，异步的意义在于“把IO操作放到内置的线程池”，通过代码检查操作状态，获得“未来”句柄结果。
The stakes in Libya are obviously high for the future of the Libyan people. But spare a thought for the future of European defence co-operation.
现在利比亚人民的未来危在旦夕。还是为欧盟未来的防御合作着想一下吧。
Contemporary accounting assumes the entity will remain in operation for the foreseeable future. This assumption is known as the "going concern" or the "continuity" convention.
现代会计假定一个单位将在可预见的未来继续经营，这种假定被称为“持续经营的企业”或“持续经营”惯例。
In future, Dr Butt envisages, the egg-sorting operation of a large hatchery might look like this: A conveyor belt moves the eggs along, gently jostling them until their allantoic sacs point upright.
展望未来，Butt博士表示，今后大型孵化工厂的鸡蛋选育操作都会像他所设想的那样：鸡蛋由传送带运输，它们互相碰撞，直到鸡蛋较小的一头（尿囊处在较小的一头）都垂直朝上，之后这些鸡蛋便整齐的排列在一排针管之下。
Both parts analysis of specific guidance and operation, and give some advises to health in nowadays and future.
这两部分就养生的具体指导和操作进行分析，结合运动养生观对现在乃至将来的养生提出建议。
In the future, the transplant operation could provide an unlimited supply of tissue to treat people whose bodies cannot produce insulin.
在未来，这项移植手术可以治疗那些身体不能产生胰岛素的患者提供无限量供应的组织。
Gates elaborated on his ideas at the university about extending the Windows operation system into television and mobile phones in the future.
盖茨在北大的演讲中详细地阐述了他关于将视窗操作系统扩展到电视和手机的想法。
Kenya claimed ownership of the cargo but the manifest suggests its destination was south Sudan, with Kenya's co- operation in its delivery to be rewarded in the future with cheap south Sudanese oil.
肯尼亚声称他们拥有这些货物的所有权，但运单上却显示目的地是南苏丹，肯尼亚只是在运输过程中有着合作的关系，在将来可能得到便宜的南苏丹原油来做为奖赏。
The address of factory's facility will relate to rationality, reliability and economy of production operation in the future.
工厂设施的选址关系到该设施在今后长期生产运营中的合理性、可靠性和经济性。
With its powerful functions of communications security, low consumption, high operation speed, ECC arithmetic has emerged good applicable future in digital signature domain.
ECC算法具有高安全性、低消耗、运算速度快的特点，在数字签名领域有良好的应用前景。
These results will help CRIEPI researchers to address problems of gas turbine operation and maintenance in the future.
这些结果将帮助研究人员CRIEPI解决问题的燃气轮机操作和维修的未来。
Modern landscape design plays a very important role in the process of planning, designing, construction and even in the future operation of resort hotels.
现代景观设计在休闲度假酒店的策划与设计建造过程及将来的运营中，均扮演着重要的角色。
I hope that there will be more business in future. And I take this opportunity to assure you of our full co-operation in this connection.
我希望将来能和你做更多的生意。我用这个机会向你保证我们会有全面的合作。
In the future, the technology will expand to the operation room, central sterile supply department and the whole hospital.
今后，物联网技术将扩大到手术室、消毒供应中心乃至全院。
Otherwise, the application of the parallel mechanism in micro operation system mentioned in the article proved the future application will be more and more widely.
另外，论文中介绍的机构在微操作系统中的应用，更加证明了少自由度并联机器人将会在各个领域应用更加广泛。
Meanwhile the experience of equipment manufacture, installation and operation has been accumulated. It lays the foundation for giant caisson application in future offshore and port engineering.
同时还积累了设备制作、安装及操作的经验，为今后在海工和港口工程中运用巨型沉箱打下了基础。
This paper introduces the basic structure, operation principle, main performances, economical problem and USES of Nd-Fe-B single - phase synchronous motor in the future.
简要介绍了钕铁硼单相同步电动机的基本结构、运行原理、性能特点、应用前景及社会、经济效益分析。
Information resources has been an emphasis for both engaging sides to contest. Precise information support becomes the pivotal link to victory in future integrated joint operation.
信息资源已成为作战双方致力争夺的重点，在未来一体化联合作战中，信息精确保障成为获胜至关重要的一环。
The importance of the sludge excess operation in the future was discussed.
讨论无剩余污泥污水生产工艺在未来生产中的重要性。
Therefore, how to execute integration within SC and realize collaborative operation among firms of an extended SC are very important in future SCM.
如何将供应链进行整合，并基于扩展的供应链进行企业间协同运作将是未来企业供应链管理的重要内容。
It has the academic reference significance for the economic operation of the cascaded hydroelectric stations in Wujiang valley, and builds the nicer foundation for the deeper research in the future.
该课题对今后乌江流域梯级水电站群的经济运行具有理论参考意义，并为今后进行更加深入的研究打下良好的基础。
Another reason for measuring assets at historical cost is the going-concern concept, which holds that the entity will remain in operation for the foreseeable future.
以历史成本计量资产的另一个原因就是持续经营概念，它认为企业在可以预见的将来继续保持经营。
Chinese officials have said a decision about the future of the AP1000 in China would depend on successful demonstration of the operation of the canned motor pumps.
中方官员已经表示，决定AP1000在中国的前景将有赖于电动屏蔽泵运行的成功示范。
Conclusion Syndrome therapy including operation and others is a very effective method in treating mixed urinary incontinence, but its long-standing result must be evaluated in the future.
结论女性混合性尿失禁的综合治疗以手术为主，辅以其他方法，效果肯定，但长期效果有待进一步随访。
Through introducing the successful example, the article could hopefully furnish valuable references for the design, operation and commissioning of future large-scale W flame boilers in China.
本文作为大容量W型火焰锅炉的成功范例，可为我国今后大容量W型火焰锅炉的设计、运行调整提供参考。
Even ignoring the future challenge, the brand operation also has become a trend in the domestic cigarette market.
撇开迎接未来的冲击不说，就国内烟草市场来说品牌运作也是大势所趋。
Even ignoring the future challenge, the brand operation also has become a trend in the domestic cigarette market.
撇开迎接未来的冲击不说，就国内烟草市场来说品牌运作也是大势所趋。
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