An oxygen transport system is possible with just the iron atoms, but it is very much more effective with the protein "cage" the structure of hemoglobin provides.

氧气运输系统只需铁原子便可运行，但血色素提供的蛋白质“笼状”结构能够大大提高其效率。

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Applying the theory and methods of system science and system engineering, this paper introduces the characteristics, functions and structure of traffic and transport system engineering.

运用系统科学和系统工程的理论与方法介绍了交通运输系统工程的特点、功能和结构。

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By studying the transport winch system structure, a pare of manual brakes are designed and its structure and function are introduced later.

在研究了运输绞车系统结构的基础上，为绞车设计了一对手动制动闸。

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"I see no reason why fares should increase faster under the new system than they do under the present nationalised industry structure, " Transport Secretary John MacGregor told the House of Commons in February 1993.

BBC: Have train fares gone up or down since British Rail?