• Swift and agile, Antarctic fur seals rely on their powerful front flippers to propel them through the water; smaller hind flippers help with steering.

    动作灵活而快捷的南极海豹依靠强大的状前肢,让它们水中顺利前行;小一些帮助控制方向。

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  • Many Canadian seals wore killed to reduce the Numbers to help the species to survive.

    大量加拿大海豹猎杀为了它们数量使物种幸存下来

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  • To some extent, the calculation, analysis and results are helpful to the brush seal design and engineering application. These can help the future research in theory and application of brush seals.

    本文计算分析过程及其结果对于密封设计工程应用一定的指导意义,进一步深入开展刷式密封的理论研究和提高应用水平奠定了良好的基础。

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  • When you bleed, your blood's clotting cells, called platelets, build up at the site of your wound. The platelets help form a plug that seals the opening in your blood vessel to stop bleeding.

    出血时血液中的凝血细胞也即血小板会聚集伤口部位形成一个塞子住你的血管止血

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  • When you bleed, your blood's clotting cells, called platelets, build up at the site of your wound. The platelets help form a plug that seals the opening in your blood vessel to stop bleeding.

    出血时血液中的凝血细胞也即血小板会聚集伤口部位形成一个塞子住你的血管止血

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