We have significantly improved our observing systems over recent years through particularly satellite systems but there is still major gaps particularly in the deep ocean.

我们近几年已大大改善了我们的观测系统，特别是借助卫星系统，但仍有很大的差距，尤其是在深海区域。

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'I don't want to end up with a job that is totally irrelevant to what I have been studying so hard over the past four years in college,' said Liu, who still hopes to find a job related to his major.

刘凯说，我不希望最后找到的是一个跟我的专业毫不相关的工作，毕竟我过去四年大学期间学习很刻苦。他现在仍希望能找到一个跟专业有关的工作。

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Steven: We have reduced emission of air pollutants in recent years, but cars are still a major source of them.

史蒂文：我们这些年也在减少有害气体排放量，但是汽车废气排放依然是空气污染的主要原因。

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While disclosure has improved somewhat in recent years, there are still major gaps and inconsistencies in reporting.

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While techniques have improved considerably in the past 20 years, the bariatric option is still a major procedure in which as many as two out of every 100 patients die on the operating table or soon after the surgery.

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To see why it should stand firm, we need only return to the NBA. Though still a major force in professional sports, the league has somewhat lost its luster in recent years.

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