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。
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。
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。
The fish live on the plankton.
这种鱼以浮游生物为主食。
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。
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。
Morsels of plankton a school of spadefish hovers near the surface off Japan's subtropical Bonin Islands.
一群西鳞白鲳在日本亚热带的小笠原群岛附近的海面上徘徊。
A sea leopard behind a curtain of plankton.
一只海豹躲在浮游生物的幕面。
These abstract shapes are actually plankton.
这些抽象的形状正是浮游生物。
So we know this plankton is very dange rous.
可见浮游生物是非常很快死亡。
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。
When it's dipped into the sea, plankton are trapped between them.
被浸没在海水中以后，浮游生物会被困在网筛之间。
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。
A giant clam's siphon is used to draw in water to filter and consume passing plankton.
巨型蛤蚌的虹吸管是被用来以过吸水的方式过滤并吸食经过的浮游生物。
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。
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。
The bugs sustain not only the plant, but an intricate food web of bacteria, plankton and invertebrates.
这些怪物不仅供养着植物，而且是由细菌、浮游生物和无脊椎动物组成的一个复杂的食物网。
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。
Plankton provides food for some of the smallest and biggest animals on the planet, including the Blue Whale.
浮游生物为地球上一些最小和最大的动物(其中包括蓝鲸)提供食物。
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。
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。
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。
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