Most intriguing is underwater walking in which wearing an oxygen helmet you meander along the ocean bed among coral and shoals of striped fish.
最引人入胜的是海底漫步，你可以戴着潜水用的氧气头盔漫步在洋底，徜徉在珊瑚和成群的条纹鱼中间。
Because of the complexity in underwater soil, river bed condition and dredging process of a real dredging project, dredging conditions are very often unsteady.
在实际的疏浚作业过程中，由于水下土质、河床形态和作业过程的复杂性，严格地讲，疏浚工况是非恒定的。
The paper introduces the bed leveling technique with underwater rail suspended on barge and positioned by GPS in deep water channel regulation works at estuary of Yangtze River.
介绍了基床悬吊刮道GPS定位整平工艺在长江口深水航道治理工程中的应用情况，着重介绍了工作原理、施工准备、施工步骤、技术要求和特殊情况下的施工问题。
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