求翻译：唐山以南天津大沽口海面，长湖“号油轮船员：据船员们目睹：7月25日，油轮四周海面上的空气咝咝地响，一大群深绿色翅膀的蜻蜓飞来，栖在船窗、桅杆、灯和船舷上，密匝匝一片，一动不动，任凭人去捕捉驱赶，一只也不飞起。是什么意思？

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tangshan South long lake surface, Tianjin Dagukou " crew of the tanker crew: According to witness: On 25 July, 4 week, oil tankers on the sea, and the air was pleased with the large group was pleased deep green wings of a dragonfly, perched on ship masts, and lights and window, and gunwale, closely

South of Tangshan Tianjin dagu mouth sea level, Chang Lake “number oil tanker crew: According to the crews witnessed that,On July 25, in the oil tanker all around sea level air si si sound, a big crowd of bottle green wing dragonfly flies, roosts on the portlight, the mast, the lamp and the broad si

Tangshan, Tianjin dagu estuary to the South Sea, Lake "the oil tanker crew: crew witnessed: July 25, and of air hissing sound around the tanker sea, a large group of dark green wings of the Dragonfly flies, lives in the shipping window, masts, lights and are electrically, tense, shirtless, allowing