人们在光线充足、能够产生光合作用、靠近水面的地方，发现了浮游生物中植物似的生物体——浮游植物。
The plant-like organisms in plankton, known as phytoplankton, are found close to the surface of the water where there is sufficient light to allow photosynthesis.
被困在深水中浮游植物，一旦有机会来到能够照到阳光的水面附近时便开始猛长。
Phytoplankton in deep water get trapped there, while phytoplankton near enough to the surface to receive sunlight start to grow faster.
他们推断落在平时缺乏铁质的水面上富含铁质的灰尘为浮游植物的大量生长创造了条件。
They concluded that iron-rich ash falling on waters that are otherwise poor in iron can create conditions in which phytoplankton thrive.
当海水表面温度下降时，较深一些的海水就会上浮，同时把这些必须营养成分带到水面处，供生活在那里的浮游植物生长的需要。
When surface waters are cold, deeper depths are allowed to upwell, bringing these essential nutrients toward the surface where the phytoplankton may use them.
在日内瓦湖中，一只天鹅浮游在水面上，一只来自Knie马戏团的大象在游泳。
A swan floats by as an elephant from the Circus Knie bathes in Lake Geneva.
当水面上大量爆发的浮游植物触发产生大量的有机物质，而这些有机物质随后下沉到水底的时候，死亡带就形成了。
Dead zones form when big blooms of phytoplankton at the surface trigger large quantities of organic matter, which then sink to the bottom.
孔雀鱼需要氧气才能存活，所以当我们看到它们无力的浮游在水面上换气时，这就是一种警讯并代表饲养缸里的水中含氧量不足。
Fish need oxygen to survive. If your guppies are gasping at the water's surface, this is a sign that there is not enough oxygen in the tank for the number of fish you have.
现在，它们又浮游在安静的水面。
现在，它们又浮游在安静的水面。
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