Space opportunity in the regional economy cooperation mainly consists the space relationship? Space key element and space cost.

区域经济合作中的空间机会主要包括区域的空间关系、空间要素和空间成本。

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The wall shear stress caused by cement slurry flowing in the annular space is a key element that affects the displacing efficiency.

水泥浆环空流动的壁面剪应力是影响顶替效率的关键因素。

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The research of the teaching space-time, which is as a key element of classroom teaching, has a long history.

教学时空作为课堂教学的重要元素，人们对其研究已有较长历史。

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The key element to their recovery is whether people are willing to share that space with them.

CNN: Group mounts image makeover for endangered carnivores

That's a key element to be sure that even inside the countries they have a certain space for the assistance and protection of the population who could not escape the conflict.

BBC: Viewpoint: 'Our concerns are the civilians'