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Tsunami waves are long waves of gravity, the wavelength of up to 100 kilometers above; its velocity equal to the acceleration due to gravity (9.8 m / s) and the product of the square root of water depth, so the deeper the water, the faster the tsunami wave, the more shallow water , the slower the speed of tsunami waves.

海啸波是重力长波,波长可达100公里以上;它的传播速度等于重力加速度(9.8米/秒)与海水深度乘积的平方根,所以,海水越深,海啸波速度越快,海水越浅,海啸波速度越慢。

On the beach when we took off his shoes and bare feet of the same towards the coast, far from the sea up the sand and soft tread and Shibuya, where Kennedy was occasionally broken stone and Beja to the feet, through this "deep shallow kick kick "of the beach, came to the coast, from sea water near the beach and the beach is just a different, affected by sea erosion as a result of long-term, so flat like a huge ink paintings of the paper, see both want to get trampled in the above its smooth feel, afraid of their own footprints printed on the above, the destruction of the picture.

在沙滩时我们都不约而同的脱下鞋子光着脚奔向海边,距离海水远的沙子踩上去又软又涩,在那儿偶尔还会被坚石和碎贝扎到脚,走过这段"深一脚浅一脚"的海滩,来到海边,离海水近的沙滩和刚才的沙滩又是有着天壤之别,由于长期受海水冲刷,所以平坦得像一张巨大的画水墨画的宣纸,看上去既想在上面踩几脚感受一下它的平滑,又怕把自己的脚印印在上面,破坏了这天造地设的"画卷"。

By electromagnetic theory, for the case that the magnetic dipole source and the receiver are set in seawater, the general expressions of frequency_domain electromagnetic responses for a layered benthal model are deduced. From those, the transient response expressions of three common configurations—vertical magnetic dipole_dipole, central loop, and coincident loop, located on the surface of uniform half_space seafloor, are derived respectively, supposing that seawater is uniform half space, or its depth is finite.

根据电磁场理论,推导了磁偶源和接收点均位于海水中时层状海底模型的频域电磁场响应一般表达式,并通过此式,得到了海水为均匀半空间和有限海水深度两种情况下,垂直磁偶极装置、中心回线和重叠回线分别置于均匀半空间海底表面时的瞬变电磁响应表达式。

According to the principle of strontium isotope stratigraphy, we attempt to determine the age of the boundaries for Campanian/Santonian and Maastrichtian/Campanian by 87Sr/86Sr ratios for Gamba section in southern Tibet.

在与国际上同期海相地层锶同位素演化曲线对比的基础上,研究了晚白垩世海相碳酸盐锶同位素组成与主要地质事件的关系;在将本研究锶同位素数据融入到全球中新代海水锶同位素曲线的基础上,综合作出了中新生代海平面变化和锶同位素对照曲线,讨论了全球风化速率,造山事件,气候,海平面变化以及灾变性事件对中新生代海水锶同位素的控制作用;根据锶同位素地层学原理,本研究尝试将碳酸盐锶同位素组成用于海相地层定年上,利用已有的全球海水87Sr/86Sr值-年龄数据库和测试的藏南晚白垩海相碳酸盐的87Sr/86Sr值,确定了岗巴剖面Campanian/Santonian和Maastrichtian/Campanian阶界线,标定了广泛分布于白垩纪的厚壳蛤化石的年龄;本研究还将这些方法推广到了塔里木盆地井下奥陶纪地层的年龄标定,确定了中/上,中/下奥陶统界线,从锶同位素角度获得了古岩溶作用证据,显示锶同位素地层学在解决海相地层对比,年龄确定及在岩溶型油气储层研究中的潜在价值和良好应用前景。

Seawater intrusion mechanism and its 3D numerical simulation are further explored and researched in this paper. On the basis of the classical theory of fluid mechanics, it built the ideal model of seawater intrusion, and attained the speed in flow field which gradually decreased along with the increasing distance of curvature center along the principal normal in the course of seawater intrusion.

以流体力学经典理论为基础,建立了海水入侵内陆的理想模型,得到在海水入侵内陆的过程中沿弯曲流线的主法线方向,流场中速度随着距曲率中心距离的增大而逐渐减小,根据流线上的速度分布,并可表示出流场中的流线方程,可确定一定条件下海水入侵内陆的速度和方向。

Three preliminary conclusions could be approached as follows:(1) SST changes were distinctively characteristic of stepwise fluctuations. A warming trend during the last deglaciation was punctuated by a slightly cooling event which corresponded to the Younger Dryas. The Holocene episode could be divided into three phases of warming, continuously high temperature and cooling.(2) Two remarkable cooling records were documented around 4 kaBP and 1.5 kaBP after the megathermal of the Holocene.(3) Comparison between time series of MD05-2904 diatom R SST index and stalagmite δ^18O results from Dongge Cave, Guizhou Province suggested that changes in the East Asian Monsoon climate is synchronous with variations in the SST in the northern SCS since the last deglaciation and they might have a close correlation with each other

结果表明:(1)南海北部15 kaBP以来表层海水温度呈现明显的阶段性波动特点,即末次冰消期气候转暖过程中,12.9~11.5 kaBP前后温度略有下降,与新仙女木事件对应,全新世南海北部气候依次经历了升温期、高温期和降温期3个变化阶段;(2)全新世大暖期鼎盛期结束后,南海北部海水温度阶段下降,两次明显降温分别发生于4 kaBP前后和1.5 kaBP前后;(3) MD05-2904孔硅藻R值时间序列曲线与董哥洞D4石笋δ^18O曲线对比表明,南海北部表层海水温度变化与末次冰消期以来东亚季风强度变化关系较为密切。

Compared with the year of 2002, the polluted ranges of offshore marine areas, such as the estuaries and loughs expanded to some extent in 2003, with the main pollutants including: petroleum, inorganic nitrogen, activated phosphate, hydrargyrum and so on.

大部分海域海水水质基本良好,符合清洁、较清洁海水水质标准,远海、近海海水水质优于近岸;与2002年相比河口、港湾等近岸海域污染范围有所扩大,主要污染物是石油类、无机氮、活性磷酸盐和汞等。

Sea water hydrometer Floating on the sea water, the hydrometer is transparent, and is easy to use and reads easily with accurate numbers.

海水比重计浮于水面的海水比重计,海水比重、盐度、显示精确,使用简单,读数容易,透明度高。

Recently-developed seawater reverse osmosis desalination technologies ( SWRO + Energy exchanger, SWRO + Interstage turbine, NF + SWRO + MSF ) and new processes of deepgoing development and utilization of marine resources with the membrane technology are discussed in detail.

包括各种新开发的反渗透海水淡化新技术,将淡化、制盐、电解和吸附相结合的海水综合利用新工艺,以及海水综合利用的资源和节能集成技术。

In hydroponics of different combination of fresh and sea water, the length of internode, stem girth ,the content of leaf dry matter, leaf chlorophyll, protein, soluble sugar, proline, malondialdehyde, catalase and peroxidase and the activity of root activity in Sesuvium portulacastrum.were detected and analysized.

主要研究结果如下: 1、在全淡水、2:1淡/海水、1:2淡/海水和全海水四种不淡/海水组合水培条件下,检测了海马齿节间长度、叶片干物质含量、叶片叶绿素含量、蛋白质含量、可溶性糖、脯氨酸含量、茎周长、丙二醛含量、过氧化氢酶及过氧化物酶、活性根系活力等11个与耐盐碱有关的形态和生理指标并进行了相应的分析。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

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