全球平均气温在过去的30年中急剧升高。
The average global temperature has climbed sharply in the past 30 years.
引起主动脉壁撕裂的发病机制很可能包括血压的急剧升高。
The mechanism is likely to involve a sharp rise in blood pressure, which causes the tear.
警察每年在美国主要城市盘查超过一百万民众，这个数字比往年急剧升高。
Police in major U.S. cities stop and question more than a million people each year — a sharply higher number than just a few years ago.
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