水下物体运动引起扰动，会在海面产生尾迹。
Submerged moving bodies may present some wake features on ocean surface.
当水下物体反射声波时，我们可以清楚地看到它的三维图像。
When the object underwater reflects the sound wave, we can clearly see its shape in the form of a 3-dimensional image.
声纳：利用声学方法侦测或测定水下物体的距离和方向的技术。
Sonar :Technique for detecting and determining the distance and direction of underwater objects by tracking acoustic echoes.
这些声音在水下行进，直到遇到水下物体，然后返回到发出信号的海豚，显示出目标的位置，大小和形状。
These sounds travel underwater until they encounter objects, then bounce back to their dolphin senders, revealing the location, size, and shape of their target.
照片提示：考虑把水面/水中拍摄来替代水下拍摄，关键在于水中要有强大的目标物体。
Photo Tip: Consider over/under photos as alternatives to underwater shots. The key is to have strong subject matter in the water.
对训练过的海豹实验已发现，即使封闭了他们的听觉和视觉，它们也可以感知水下的物体。
Tests with a trained seal have revealed that the animals can sense underwater objects, even with their hearing and sight restricted.
物体表面的压力随着物体在水下深度的变化而变化。
Pressure on the surface of an object changes with the depth of the object below the surface of the water.
钟虫一种钟虫属有纤毛的原生动物，具有铃状的身体，常连在一个植物或其它物体的细茎上并居住于水下。
Any of various ciliate protozoans of the genus Vorticella, having a bell-shaped body and living underwater on a slender stalk often attached to a plant or other object.
通过总结，笔者认为磁法探测技术是寻找水下磁性物体的最有效的方法。
It is believed that magnetic survey is the effective technique to search for ferromagnetic objects underwater.
为了降低水下航行器和物体表面的声反射和声辐射强度，可以采用玻璃钢夹层结构代替单层玻璃钢结构。
To reduce the acoustic target strength of submarines and other underwater objects, a single layer of glass fibrous reinforced composites (GFRP) was replaced by a sandwich of the material.
物体表面的压力随该物体在水下的深度而变化。
Pressure on the surface of an object varies with the depth of the object below the surface of the water.
研究这种尾迹特征及其合成孔径雷达(SAR)成像，就有可能利用SAR来检测这个水下运动物体。
It is probably using Synthetic Aperture Radar (SAR) to detect submerged moving body through studying these wake features and its imaging by SAR.
浮船箱一种用于提起沉落于水中的物体的设备，由一个沉入水下的中空的结构构成，与落水物紧贴在一起并被抽空水。
A device used to raise sunken objects, consisting of a hollow structure that is submerged, attached tightly to the object, and pumped free of water.
水下可容空间增量与同期供给的沉积物体积之间的对比关系控制层序的演化和体系域的形成。
The correlative relationship between increment of subaquatic accommodation space and synchronous sedimentary volume controlled the evolution of sequence and the formation of system tracts.
本文阐述了水下流噪声产生的机理以及物体表面状态性能对湍流边界层的影响。
In this paper, the mechanism of flow noise production and the methods of flow noise reduction are presented.
可以肯定的是，黑匣子是此地区水下某处被打捞的，但黑匣子的数据却被破坏了，保存数据的圆柱形物体断裂了。
Sure enough, the box was there - but its data was gone. At some point, the cylinder that holds the data apparently broke off.
当一个正在水下行驶的物体为了减小经由一个浸水面产生的阻力而沿其全身或局部部位有意排泄出气泡时，超空泡就产生了。
Super-cavitation is created when gas bubbles are intentionally vented along all or part of an object travelling underwater so as to reduce the drag caused by a wetted surface.
当一个正在水下行驶的物体为了减小经由一个浸水面产生的阻力而沿其全身或局部部位有意排泄出气泡时，超空泡就产生了。
Super-cavitation is created when gas bubbles are intentionally vented along all or part of an object travelling underwater so as to reduce the drag caused by a wetted surface.
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