Characteristics and limitations of some important life prediction methods are analyzed with emphasis on SCC of engineering materials used in high temperature water in nuclear power plants.

以核电工程材料在高温水中的应力腐蚀破裂为重点，分析了几种重要的寿命预测方法的特点与局限性。

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President Obama has restricted the conditions under which the United States would consider using nuclear weapons, but stipulated that the limitations do not apply to any potential confrontation with Iran or North Korea.

VOA: standard.2010.04.11

Steve Andreasen, is a former arms control expert on the National Security Council, "It places limitations on strategic nuclear delivery vehicles - that is long-range bombers and long-range intercontinental ballistic missiles on submarines and based on land.

VOA: standard.2009.04.08

Accordingly, no new nuclear testing limitations agreements should be undertaken.

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This is expected to be accompanied by a U.S. commitment to undertake further "intermediate" limitations on nuclear testing, perhaps involving testing quotas and lower thresholds.

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Tomorrow, Clinton Administration cabinet officers are scheduled to meet to consider a draft of Presidential Review Document-19 (PRD-19), a decision memorandum intended to respond to congressional limitations on nuclear testing.

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