And the researchers say that the rediscovered Russian reflector is particularly useful for studying the moon's liquid core and testing ideas about gravity.

研究者们还表示重新找到的俄国反射器对于研究月球液核并测试有关重力的猜想大有裨益。

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In continuous casting course, the liquid core length is a very important parameter, it reflects the cooling condition of casting and the appropriate degree of pulling speed.

在连铸生产工艺中，连铸坯的液芯长度是连铸生产中一个非常重要的参数，它直接反映了铸坯冷却的状况和拉速的合理程度。

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As a new kind of optical fiber, liquid core fiber is also called liquid-core light-conducting tube. It has superior optical properties as compared with conventional optical fibers.

液芯光纤也叫液芯光导管，是一种全新的光纤品种，与传统的光纤相比，有着优异的光学性能。

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The top half would use the liquid-fuelled core-stage technology and engine that powers the Ariane 5.

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This architecture also enables NASA to leverage existing capabilities and lower development costs by using liquid hydrogen and liquid oxygen for both the core and upper stages.

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The origin of this effect may lie at the boundary between the mantle, made up of viscous rock that extends 2, 900 km (1, 800 miles) below the crust, and the outer core, which is thought to be liquid iron with the consistency of water.

BBC: Earth's wobbles reveal deep secrets