中英释义：
双语例句
利用二重积分表示流域降雨总量.
The watershed total rainfall is expressed by using double integration.
重点词汇
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积分
integration; points; score; credits; integral; cumulative points
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表示
express; show; mean; signify; convey; denote; betoken; indicate; extend; represent; stand for; manifest; present; pronounce; expression; marker; indication; representation; manifestation; expressive; for