During Daoguang and Xianfeng, Qin dynastys frontier danger was vulnerable to attack on all sides, the effective frontier policy began to fail.

道光咸丰时期，清王朝边疆危机四伏，原来行之有效的边疆政策开始走向破产。

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Facilitate interactions with policy-makers on latest national and regional initiatives and frontier issues.

促进与决策者就最新的国家和区域倡议以及边界问题进行交流。

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But Britain's new government, despite having an opt-out from a frontier-free policy, and some others are reluctant.

ECONOMIST: By the esoteric art of treaty revision

Last week, the Pentagon demonstrated for the third time in a row the inherent feasibility of recommendations insistently advanced over the past seven years by organizations like the Center for Security Policy, High Frontier and the Heritage Foundation: The U.S. Navy's Aegis fleet air defense system can be rapidly and effectively adapted to perform ant-ballistic missile missions from the sea.

CENTERFORSECURITYPOLICY: Get On With It: Time To Deploy Sea-Based Missile Defenses

"The North Korean announcement is disappointing particularly in consideration of the efforts by the U.S. and South Korea to improve the situation and try to find a way to resume the six-party talks, " said Park Chan-bong, a policy adviser in South Korea's ruling New Frontier Party and former negotiator with the North.

WSJ: U.S. Warns North Korea Over Rocket Launch