在水下的

Underwater color photography was born with this shot of a hogfish, photographed off the Florida Keys in the Gulf of Mexico by Dr. William Longley and National Geographic staff photographer Charles Martin in 1926. Equipped with cameras encased in waterproof housing and pounds of highly explosive magnesium flash powder for underwater illumination, the pair pioneered underwater photography.

意译：海底下的彩色图片诞生在摄影一种猪形之鱼，照片来自佛罗里达的墨西哥海湾，由威廉博士长期和国家的路杂志的摄影师查尔斯·马丁合作于1926年预备防水设备的照相机和高曝光的镁闪光粉保证能够在水下照明，他们成为水下摄影的先驱者。

It is active day and night and remains active in winter, when it has been observed tunnelling through the snow and swimming in ice-covered streams.

它不论白天还是晚上都很活跃，甚至在冬天也充满活力，它被发现通过隧道穿越雪地，以及在冰面的水下游泳。

The Activated Ploy-oxygen Aerator adopts magnetic engineering technology to send the oxygen of air which is gathered and activated by polyoxier to the mixing chamber of main engine under water, and the process of water and oxygen synthesization is finished rapidly by the use of magnetizer and activated oxygen enriched air under water, which has been cut into tiny air bubbles by the high-speed rotated propeller of the mixing chamber in the process of water and oxygen synthesization, which can increase the affinity of water and oxygen. When flow rate of water is more than the buoyancy force of the tiny air bubbles, it is difficult for the tiny air bubbles to float on water in short time and the tiny air bubbles can stay in water for longer time, which can increase the efficiency of water dissolving oxygen and make the power efficiency of the machine is greater than traditional aerator obviously.

聚氧活化曝气增氧机采用磁性工程技术，将空气中的氧经聚氧器聚集活化后送到水下主机的混合室，由水下的磁化器和活化富氧空气快捷完成水气合成程序，在水气合成过程中已被混合室内高速旋转的离心叶轮切割成微小气泡，这些随射流、射向水下方的小气泡，其动能消耗至零后，在水中的浮力作用下、开始缓慢上升，由于提高了水与氧亲合力的小气泡只靠浮力沿着螺旋型的曲线缓慢浮升，这些小气泡在短时间很难浮上水面，因此延长了小气泡在水中的停留时间和行走路程，大大提高水中溶解氧的效率，使该机的动力效率明显高于传统曝气装置。

Nanjing Xuanwu Tunnel,a subaqueous highway tunnel in the centre of the city is a typical geoengineering project in vulnerable environment .

南京玄武湖隧道，既在城市中心，又在水下，是脆弱环境下典型的地质工程。

Aimed at the complex work state, we considered the metacentric stability and the dynamical stability in the situation of above and below the sea lever, studied the movement from the underwater to the surface, so as to prove that the collectivity escaping chamber will not jump out of the water.

针对集体逃生舱工作状态复杂的特点，考虑了在水下和水上两种情况下的静稳性以及水上情况下的动稳性，同时研究它从水下到水面的运动情况，以证明集体逃生舱不会从水面跳出和发生倾覆。

Nymphoides on the green ooze, oily in the underwater swagger; In the Kang River Roubo years, I will be glad to do a water plant!

在果岭上渗荇，含油在水下昂首阔步；在康河的肉搏年，我会很乐意做一个自来水厂！

I stayed very deep in the water because I knew that I could be killed by the huge water wheel that powered the boat.

我呆在水下很深的地方，因为我知道驱动大船的巨型水下涡轮会要了我的命。

"For three decades I have tried to imagine how it might be possible to build a car that can fly under water," said Rinderknecht in a statement.

在一次陈述中他表示：三十年来我都在考虑要如何才能建造一辆在水下滑翔的汽车。

This paper based on the principle of having the underwater explosion as a interference source to make the guidance system of torpedos failure, and according to the similarity theory to equivalent the real situation into test model , and analysis the damage

论文文摘本文基于水下爆炸作为干扰源使鱼雷制导系统失灵的原理，应用相似理论，将实际情况等效缩比为试验模型，分析该等效模型在水下爆炸作用下的破坏情况以及对鱼雷自导系统的影响。

I ended up choosing two one for use almost everywhere including the beach, and one for use underwater while snorkelling and diving.

最终，我选择了两台：一台用来在包括海滩在内的几乎所有地方拍摄，一台用来在我浮潜和潜水时在水下拍摄。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。