Before the mass extinction, the top ocean predators were primitive sharks.
在大规模灭绝之前，高等海洋肉食生物是远古的鲨鱼。
While the top of the ocean is well studied, its depths are more difficult to explore.
虽然人们对海洋的上层进行了深入研究，但对海洋深处的探索却比较困难。
There's an angler fish at the bottom of the ocean that has a rod sticking up from the top of its head with a lure to capture other fish.
在海底中生活着一种琵琶鱼，它的头顶有一根突出的杆，带有用来捕获其他鱼类的诱饵。
Sharks have reigned at the top of the ocean food chain for hundreds of millions of years.
千百年来，鲨鱼一直处在海洋生态链的顶端，是海底世界的王者。
Evidence for an early lunar magma ocean comes from orbital data showing an abundance of plagioclase, a lightweight mineral that crystallises from and floats to the top of magma.
根据轨道数据资料，月球早期岩浆海洋的迹象显示了月球上含有丰富的斜长石，它是一种从岩浆中结晶出来、并漂浮在岩浆顶上的轻矿物。
Gleaming starkly white, the frozen Arctic Ocean crowns the top of the world above 66 degrees north latitude.
闪烁着荒凉的白光，冻结的北冰洋占据着北纬66度以上的世界顶部。
Driven by the wind and tides, these familiar waves ride across the top of the ocean.
受风和潮汐驱动，这些熟悉的波浪越过海洋表面。
The ocean floor rock, basalt, along with the sediment that built up on top of it, was drawn down at the edge of an ocean as part of the conveyor-belt mechanism that moves the continents.
海洋板块的岩石，玄武岩，以及覆盖其表面的沉积物被拉沉到海洋底部，充当移动大陆的传送带机制的一部分。
Basically surface Earth is mostly ocean with a scoop of fresh water on top.
基本上可以这么说，地球表面上空是一个拥有巨量水源的大洋。
As the ocean warms, it becomes more stratified, with the warmer water remaining at the top where the organisms need to be in order to do photosynthesis.
但是随着海水变暖，它的层次会更加分明，温度更高的海水会停留在表面，而这里正是生物体进行光合作用必需的地方。
As the glaciers advanced, they scraped off the top layer of rock and soil on land and then released minerals and nutrients into the ocean as they retreated.
在冰川进展过程中，它们剥脱了陆地表面的岩石和土壤，然后在撤退时将矿物质和营养物质释放到海洋中。
Hitherto it was assumed that the main way carbon gets from the top to the bottom of the ocean was as part of dead planktonic algae sinking to the seabed.
在此之前，人们一直认为碳从海面转移到海底的主要途径是伴随着浮游藻类死亡后而沉没海底。
An elevator takes visitors up to the top floor where an observation deck offers 360 views of the ocean and city.
电梯将游客带至顶层，这里是可360度观赏海景和城市风景的观景台。
One day, the King and all the top civil and military officials went to the ocean in a dragon boat to sightsee.
有一天，国王和很多文武百官一起坐龙船出海游玩。
The 115-island Indian Ocean archipelago is a popular top-end tourist destination, with some villa accommodation costing as much as 10, 000 euros per night.
拥有115个岛屿的印度洋群岛是个热门的旅游胜地，在岛上的别墅酒店住上一晚就得花费高达1万欧元。
Soaring rates of obesity in the Pacific Islands, nations in the South Pacific Ocean east of Australia and Fiji, have shot to the top of the worldwide obesity scale.
在太平洋岛一些岛屿、澳大利亚及斐济东部的南太平洋的一些国家里，不断升高的肥胖率使它们有望成为世界上肥胖人口最多的国家。
Top condition and very quite in front of ocean.
条件相当好，在海洋的面前。
Top Pakistani and U. S. commanders met on an aircraft carrier in the Indian Ocean last week to discuss border security.
巴基斯坦和美国高级将领上个礼拜在印度洋上的美军航空母舰上进行了闲谈，参议边境平安排场境界。
Reach your final destination at the top of your hike to discover the sun setting over the ocean.
徒步达到山顶，达成最终目的，看到海上的日落。
The top finisher here was Saturn's moon Titan, which scored 0.64, followed by Mars (0.59) and Jupiter's moon Europa (0.47), which is thought to host a subsurface water ocean heated by tidal flexing.
排在前几位的最终优胜者是：土星的卫星—土卫六，得分为0.64，其次是火星(0.59)以及木星的卫星—木卫二(0.47)，它这被认为拥有一片由潮汐可挠性加热的地下海洋。
The top finisher here was Saturn's moon Titan, which scored 0.64, followed by Mars (0.59) and Jupiter's moon Europa (0.47), which is thought to host a subsurface water ocean heated by tidal flexing.
排在前几位的最终优胜者是：土星的卫星—土卫六，得分为0.64，其次是火星(0.59)以及木星的卫星—木卫二(0.47)，它这被认为拥有一片由潮汐可挠性加热的地下海洋。
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