The reinforced concrete face slab for the upper reservoir of the Shisanling Pumped Storage Power Station is a structure under bitter cycle of freezing and thawing.

十三陵抽水蓄能电站上水库的钢筋混凝土面板是一种在严酷冻融循环条件下运行的钢筋混凝土结构。

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Comment on "Enhanced upper stratospheric ozone: Sign of recovery or solar cycle effect?" By W. Steinbrecht et al.

等人对“上部平流层臭氧增强：是复原式是太阳循环作用的信号?。

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The plates can be installed from lower floors to upper floors. Installation can be simultaneously carried out with civil engineering, which is conducive to shorten the overall construction cycle.

从楼层下方向上方安装，能够和土建配合同步施工，有利于缩短整体建筑施工周期。

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The elections are staggered so that about one-third of the "upper" chamber faces a challenge in any given election cycle.

CNN: The insider's guide to the U.S. Congress

But in the longer term, whenever the industrial cycle picks up again, platinum should regain the upper hand against gold, Bhar said.

FORBES: Gold Prices Poke Above Platinum On Global Macroeconomic Concerns