Of course he spoke with a conventional sense of duty only, for that sort of wondering had not been unknown to himself in bygone days.

当然，他说这话的时候，是出于一种习惯的责任感，因为在过去他自己也不是没有产生过这样的疑问。

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The limitation of the conventional design of the heavy duty ingot mold has been analyzed in this article.

分析了传统设计在大型钢锭模上的局限性，为采用计算机设计大型钢锭模提出新的思路。

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The research indicates that the conventional pavement technique can only be suitable for the normal pavement design but not for the heavy-duty pavements.

研究表明，传统路面设计技术仅仅适用于低等级道路路面的设计；

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Some of the GCSs are classified secret, and used for conventional warzone surveillance duty.

CNN: Computer virus hits U.S. drone fleet

Ben Thornley: We were surprised to discover that, even within the constraints of fiduciary duty and the strictures of conventional portfolio management, US institutional asset owners have been very creative in finding ways to support regional economies and deliver the other secondary social or environmental impacts of priority to beneficiaries.

FORBES: What Would Impact Investing At Scale Look Like? $20 Trillion for Good

In other words, conventional fuel (gasoline and diesel) light-duty vehicles will be with us for many years to come, exhaling pollutants and making the world a dirtier place.

FORBES: America's Dirtiest Vehicles 2013