目前在世界上所有的蓝洞中，中国南海的三沙永乐蓝洞是最深的。

Of all the blue holes in the world, Sansha Yongle Blue Hole in the South China Sea is now the deepest.

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他是黑人，他是亚洲人，蓄着金色胡须的蓝眼雅利安人，一头维达•沙宜设计的发型，心地善良的外星人，根本从未存在过。

He was black, he was Asian, he was a blue-eyed Aryan with a golden beard, and hair straight out of vidal sassoon's, he was a benevolent alien, he never existed at all!

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方法：采用甲苯胺蓝、爱尔沙蓝特殊染色法及电子显微镜技术。

Methods: Special stainings of toluidine blue, Alcian blue and electron microscopic technique were used in the study.

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