Large area freezing, damage etc. failures occen occur on the air cooling condensers during start-up and shutdown of large size direct air cooling coal-fired generating units in winter.

大型直接空冷燃煤发电机组在冬季启停过程中，空冷凝汽器常常会发生大面积冻结、损坏等事故。

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Moreover, seasonal freezing and melting and seasonal drying and wetting are the direct factors causing soil to expand and contract.

认为土壤胀缩运动主要决定于土壤粘粒的含量，同时季节性冻融作用与干湿交替作用是导致土壤胀缩运动的直接因素。

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The results show that, the stable and thicker melting layer and cold layer in low level was direct cause of exist the wide range of freezing rain.

结果表明，深厚而稳定的逆温层和低空冷层的存在是大范围冻雨出现的直接原因。

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This is the direct and predictable result of the practice of essentially "freezing" our nuclear weapons strategy and stockpile over the past seventeen years since the end of the Cold War.

CENTERFORSECURITYPOLICY: Towards a New Deterrent

Clinton's 20 hours in Pyongyang could pave the way for renewed diplomatic efforts, including direct dialogue between the United States and North Korea, the re-freezing of North Korea's nuclear program and even North Korea's return to the six-party talks.

CNN: Commentary: Bill Clinton shows that diplomacy works