The eight-day exercise is being held in the South China Sea, where both navies will conduct maritime surveillance, air defense and anti-submarine warfare exercises.

为期八天的演习正在南海举行，双方的海军都将进行海上监视，防空和反潜战演习。

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Monitoring stations in many cities were ordered to conduct around-the-clock surveillance of radioactive substances in the air and sea water.

许多城市的监测站受命对空气和海水中的放射性物质进行全天监测。

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Two years ago America complained when Chinese vessels harassed a surveillance ship, the USNS Impeccable, in the south China Sea south of the Chinese island-province of Hainan.

两年前，美国抱怨中国船只干扰美国侦查舰无畏号在海南以南的南中国海的侦查活动。

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The company's challenge is to turn the Merlin, an anti-submarine and search-and-rescue vehicle, into a craft that can also take over the Sea King's airborne surveillance and control duties without breaking the bank.

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In 2009 it proved useless when tempers flared over a standoff between Chinese boats and an American surveillance vessel in the South China Sea.

ECONOMIST: Wary detente between China and America

Turning to Japan, Xinhua says a Chinese marine surveillance ship patrolled waters near disputed East China Sea islands for a second day in a row on Monday.

BBC: China media: North Korea nuclear test