They discovered that the rafting snails are descendents of sea-floor snails that parasitize corals and sea anemones.
为了找到答案，研究人员对它们以及其他潜在亲属的DNA进行排序。 他们发现漂浮泡泡蜗牛是寄生于珊瑚和海葵的底栖蜗牛“梯螺”的后裔。
Gigantic palm trees also sprouted along the coast-artificial islands made from sea-floor sand protected by rock breakwaters.
沿着海岸线也有很多高大的棕榈树，人工海岛由海底的海沙填成，并有防波堤保护。
For example, sea stars prey on a variety of bivalve mollusks and prevent these bivalves from monopolizing habitats on the sea floor.
例如，海星捕食各种双壳类软体动物，防止这些双壳类动物独占海底的栖息地。
It had, apparently, been fished out of existence; and the once might Newfoundland fleet now gropes about frantically for crab on the sea floor.
显然，由于捕捞，它已经灭绝了；而曾经很强大的纽芬兰舰队现在在海底四处搜寻疯狂地找蟹。
The scientists placed black charcoal the size of sand grains on the sea floor to see whether the fish would move it; they scattered it everywhere.
科学家们把沙粒大小的木炭放在海床上，看赤点石斑鱼能否搬动他们；结果木炭被弄得到处都是。
Though they represent the deepest life ever discovered beneath the sea floor, microbes of various kinds have been discovered at even greater depths under the continents.
尽管它们代表着海床之下发现的最深的生命，在大陆上却在地表之下更深处发现过很多类型的微生物。
Even more worrying, however, is the impact of rising sea temperatures on the far greater reserves of methane hydrates that are found on the sea floor.
除此之外，海床上储藏着更为大量的甲烷水化物，而不断升高的海洋温度对此的影响更为令人堪忧。
Recently, living cells - many of which are Archaea from the Pyrococcus and Thermococcus genera - were found in a mud core taken from 1.6 km below the sea floor off the coast of Newfoundland.
最近，纽芬兰岛海岸的海床之下1.6千米深处取出的砂心泥中，发现了活着的细胞，其中很多是热球菌纲火球菌属的古菌。
While the sea floor has had significant study, he points out little exploration has been done on this water above the deep floor.
他指出尽管对海床有丰富的研究，但针对海床上的水却甚少探索。
What impacts are we talking about - on the coast, on the ocean surface, or the sea floor?
什么样的影响该被我们谈论——是对海岸、对海平面还是对海底？
Silt turbidite (landslide) layers on the deep sea floor far off the coast from underwater landslides, likely caused by strong seismic shaking.
离海底滑坡不远的深海底床的淤泥浊积(滑坡)层很有可能是由强烈的地震晃动造成的。
Even more distant fields can be "tied back" to a platform using pipelines along the sea floor.
即使是距离更遥远的海域也可以通过海洋底部环绕的管道“捆绑回”一个平台。
When they reached the sea floor and wanted to rise again, they simply let of the iron pellets.
当他们到达海底然后想要再升起来的时候，他们只要放开铁球就可以。
Rinehart said remotely operated underwater vehicles monitoring the sea floor around the well have so far revealed no evidence of oil or natural gas leaks.
瑞恩哈特说，经由遥控在油井周围观测海底的水下载具到目前为止还没有显示石油或天然气泄露的迹象。
The oil and gas driller can send seismic waves miles under the sea floor, gather the echoes, and deduce whether petroleum might exist there.
石油和天然气钻孔机可以在海平面以下数里之外传送地震冲击波，收集回声，并对该地区是否存在石油做出推理。
Dr Scott argues that underwater mining will be far less disruptive to the environment than terrestrial mining: there will be no piles of waste rock, since the deposits are directly on the sea floor.
斯科特辩解说水下开采将比陆地开采带来的环境破坏少得多：由于是直接在海底作业，因此将不会有大量的岩石废料。
What does life look like on and below the sea floor?
海底和海底以下的生命是什么样的？
Years ago, she was on a National Oceanic and Atmospheric Administration vessel in the Gulf of Mexico looking at images from a remotely operated camera and noticed the large holes on the sea floor.
几年前，她在海洋和大气治理署的船上，在墨西哥湾，当从一个远程操作摄像机观看影像时，注意到了海床上较大的坑洞。
This is part of the system of mid-ocean ridges that form as the tectonic plates of the Earth's crust move apart-a process known as sea floor spreading.
印度洋脊是中大洋脊的一部分，中大洋脊是地壳分离的地球板块形成的。这一形成过程被称为海底扩张。
Various methods of containing oil spills have been developed, including controlled burns, domes over the oil spill, and the use of remotely operated vehicles to manipulate equipment on the sea floor.
有关人员尝试了多种方法遏制原油泄露，包括控制燃烧，在浮油上覆以穹顶，并且使用了远程操纵的载具来操作位于海床上的设备。
Africa and South America, for example, are moving away from each other as new material is injected into the sea floor between them.
例如，由于有新的物质注入二者之间的海底，非洲和南美洲距离越来越远。
It hopes to develop a floating wind turbine, which it believes would be cheaper to build and install than current offshore models, embedded in the sea floor.
该公司希望能开发一个浮动的风力涡轮机，并相信这种设施的建设与安装调试比现行根植于海底的离岸模式更加省钱。
The team of scientists captured the sea creatures using special low-light sensitive, custom designed remote controlled cameras, which sat on the sea floor.
这个科学家团队利用特别定制的低光敏遥控相机捕捉呆在海底的生物照片。他们在海底拍摄了十天。
Little Hercules is cruising over hydrothermal springs, abyssal muds and the rocky tops of seamounts-a kind of underwater mountain that rises from the sea floor.
“迷你大力神”在热水泉中游动，在深海的泥沙中穿梭，还时不时跨过海底山的顶部岩石，这里的海底山是一种海床上隆起的水下山脉。
Found underground and on the sea floor, methane hydrate consists of natural gas molecules trapped within a lattice of frozen water molecules.
甲烷水合物主要存在于地下以及海底，由甲烷分子被锁在固态水晶体格中所组成。
Fossil bodies might get into such rock by sinking to the sea floor.
化石体必须沉到海底才能进入这块岩石。
Fossil bodies might get into such rock by sinking to the sea floor.
化石体必须沉到海底才能进入这块岩石。
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