The algorithm proposed by us for polygonal chains intersection based on the sweep line algorithm is extended, and it is used to detect and delete global self-intersections in the rough offset curve.

拓展了我们已有的平面上单调链求交的扫描线算法，将其应用到初步等距线中的全局自交点和全局无效环的确定上。

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He moved nearer the edge, stood up, and with a vigorous sweep of his arm, cast out the line.

他走到水边，站起身，用力挥动手臂，将钓鱼线抛了出去。

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Seven A. M. the usual morning line-up. Start onthe chores, and sweep 'til the floors all clean.

早上七点开始，又是平常的一天。先开始扫地，扫到地面一尘不染。

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Richard Kipkemboi Mateelong took silver with Frenchman Bouabdellah Tahri preventing a Kenyan clean sweep by finishing strongly and pipping Paul Koech on the line for bronze.

BBC: Bolt storms through to 200m semis

But after he was out top-edging a reverse sweep off Patel to Ambrose, the rest of the batting line-up struggled to provide Powell with sufficient support.

BBC: Bears stumble but beat Glamorgan