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自1987～1990的四年中,大洋钻探按即定计划进行,取得丰硕成果,这是迄今为止,关于大洋钻探计划执行情况新进展的一篇最新综合报导。
In the four years from 1987 to 1990, ocean drilling was carried out according to a tentative plan with fruitful results. This is the latest comprehensive report to date on the recent progress in the implementation of the ocean drilling program.