南海北部海域具备生物礁的形成和发育的一切必要条件。
All necessary conditions for the formation and growth of bioherm existed in the northern part of the South China Sea.
南海北部陆架区29个调查站的表层沉积物样品中，重金属含量较低，明显低于沿岸污染海域。
The heavy metal contents in 29 surficial sediment samples from the continental shelf of the northern South China Sea were significantly lower than those in the samples from the polluted coastal areas.
南海北部陆架区29个调查站的表层沉积物样品中，重金属含量较低，明显低于沿岸污染海域。
The heavy metal contents in 29 surficial sediment samples from the continental shelf of the northern South China Sea were significantly lower than those in the samples from the polluted coastal areas.
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