The first organisms that reproduced sexually were free-floating plankton.
最早的有性繁殖生物是自由漂浮的浮游生物。
Some areas, though rich in these nitrogen compounds, have few plankton.
有些地区虽然富含氮化合物，但浮游生物却很少。
This book has large color photographs of sea animals, from plankton to clownfish to orcas.
这本书有许多海洋动物的彩色照片，从浮游生物到小丑鱼乃至逆戟鲸。
This change in plankton found in marine deposits is what marks the boundary between the Cretaceous and the Tertiary.
海洋沉积物中浮游生物的这种变化标志着白垩纪和第三纪的分界线。
Most marine deposits from around the world contain either plankton or a lot of fern spores but not both together in the same layer.
世界上大多数的海洋沉积物不是含有浮游生物就是含有大量的蕨类孢子，但它们并不是同时存在于同一层中。
There may be giant plankton on gaseous planets. They float in a thick atmosphere like small spaceships and live by "eating" lightning.
气态星球上可能存在巨型浮游生物。它们像小型飞船那样漂在厚厚的大气中，靠“吃”闪电获取能量为生。
Plankton generally thrive in areas of the ocean with sufficient concentrations of certain nitrogen compounds near the surface, where plankton live.
浮游生物通常在海洋表面附近某些含氮化合物浓度足够高的区域大量繁殖，而海洋表面正是浮游生物生存的地方。
These areas have particularly low concentrations of iron, and oceanographers hypothesize that this shortage of iron prevents plankton from thriving.
这些地区的铁含量特别低，海洋学家推测，铁的缺乏阻碍了浮游生物的繁殖。
However, an experimental release of iron compounds into one such area failed to produce a thriving plankton population, even though local iron concentrations increased immediately.
然而，尽管当地铁浓度立即提高，在一个这样的区域实验释放铁化合物却没有产生大量的浮游生物。
These abstract shapes are actually plankton.
这些抽象的形状正是浮游生物。
Corals, plankton and shellfish may literally dissolve.
珊瑚、浮游生物和贝类动物很可能被酸性海水溶解。
More plankton means more carbon dioxide sucked from the air.
更多的浮游生物就意味着空气中更多的二氧化碳被吸收。
Threats: Pesticides and pollution can damage plankton blooms.
威胁：杀虫剂和污染能破坏浮游生物的密集繁殖。
It has large color photographs of sea animals, from plankton to clownfish to orcas.
在书里，有着许多海洋动物的彩色照片，从浮游生物到小丑鱼乃至逆戟鲸。
Dump iron into the sea to boost plankton growth and soak up carbon dioxide from the atmosphere.
向海洋中倾倒铁以促进浮游生物生长来吸收大气中的二氧化碳。
Dr Sceffer's laboratory is full of bottles containing samples of lake water brimming with plankton.
席弗博士的实验室里堆满了装有湖水浮游生物的样品瓶子。
In some areas, the amount of plastic outweighs the amount of plankton by a ratio of six to one.
在有些区域，塑料的数量与浮游生物的数量之比达到了六比一。
The second largest fish in the world, it basks with its mouth open wide to catch plankton drifting by.
作为世界上第二大的鱼类，姥鲨张着大嘴来捕捉漂流而过的浮游生物。
That can mean as much as 112 times more plastic than plankton, the first link in the marine food chain.
也就是说，塑料的数量竟达到海洋食物链第一环浮游生物的112倍。
Each pond often has a unique array of species, from plankton to fish-even if it was created by scientists.
而每个池塘都有其独有的生物序列，从浮游生物到鱼类各不相同，这一特点甚至适用于人造的池塘生态系统。
The subsequent plankton bloom sucked up the 12c and the isotope ratio veered off in the opposite direction.
随之而来勃发的浮游生物吸走了12c，碳同位素比率转向相反方向。
Doubts about how deep the plankton would sink have raised questions on how permanent a solution it would be.
对浮游生物能下沉多深的疑问使人们质疑这个方法在长期内的有效性。
We placed a plankton net in our rear, waited five minutes, and then hauled in a cornucopia of living things.
我们在筏子尾部放置了一张捕捞浮游生物的网，等了几分种后收网，网中活物不少。
Jellyfish, by comparison, are 10% carbon, and diatoms (single-celled algae that are common in plankton) 20%.
相比之下，水母的碳含量为体重的10%，而硅藻(是单细胞海藻，属常见的浮游生物)则为20%。
Conodonts lived in the Cambrian seas, and may have eaten certain types of plankton, but no one knows for sure.
牙形刺生活在寒武纪的海洋中，可能以某种浮游生物为食，不过没人清楚具体情况。
The gentle giants are filter feeders, swimming with their wide mouths open to collect plankton and small fish.
它——温和的巨人，是滤食动物，通过在游泳时张大嘴巴来捕食浮游生物与小鱼。
That translates to an annual drop of about 1 percent of the average plankton population between 1899 and 2008.
这意味着自1899年至2008年之间，浮游植物的数量平均每年减少约百分之一。
This is the first study to attempt a comprehensive global look at plankton changes over such a long time scale.
这是第一次意在全面观察全球海洋浮游生物在如此长时间里所产生的变化的研究。
One type of plankton that seems to have great harvest possibilities is a tiny shrimp-like creature called krill.
一种似乎具有很大收获可能性的微小的虾状浮游生物被称为鳞虾。
Because plankton are the base of the Marine food chain, the South Atlantic Ocean supports a rich Marine ecosystem.
由于浮游生物是整个海洋食物链的基础，所以南大西洋在海洋生态系统中起着重要作用。
应用推荐