Photograph by Kaido Haagen, A gray seal pokes its head through "clouds" of plant life in a winning picture by Estonian photographer Kaido Haagen.

爱沙尼亚摄影师Kaido Haagen拍摄的一只灰白色海豹从水底植物"云朵"中探头照片获得最佳图片。

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The reason why gray castiron bridge pipeline with ammonia seal was quickly corroded was discussed and the countermeasure was suggested.

探讨了焦炉氨水自封槽结构灰铸铁桥管快速腐蚀的原因，提出了相应的处理对策。

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And,Gray Seal Puppets, based in Charlotte, North Carolina travels around the United States.

VOA: special.2009.09.23