They're the main photosynthesizers in leaves, and they store starch, or extra sugar reserves, in roots like sweet potatoes.

它们是叶片中的主要光合作用者，它们在根中储存淀粉或额外的糖储备，比如红薯。

By selectively eating the bacteria, researchers think, sponges made room for other, bigger photosynthesizers to evolve.

研究人员认为， 通过有选择地食用细菌，海绵为其他更大的光合作用生物的进化腾出了空间。

This means Prototaxites was not a photosynthesizer, but an eater -- it got its food from other living things.

这意味着 Prototaxites 不是光合作用者，而是食者——它从其他生物那里获取食物。

Half the oxygen we breathe comes from marine photosynthesizers such as phytoplankton and seaweed.

我们呼吸的一半氧气来自海洋光合作用，例如浮游植物和海藻。

In fact, those cells that live in the bottom of the sunlit zone are the most efficient photosynthesizers of any known cell.

事实上，那些生活在阳光照射区底部的细胞是所有已知细胞中最有效的光合作用者。

While almost all of them are full-time  photosynthesizers, some strains can supplement their diet of sunshine with organic carbon  from the environment when light levels are low.

虽然几乎所有菌株都是全职光合作用者，但当光照水平较低时， 一些菌株可以用环境中的有机碳来补充它们的阳光饮食。

They're the smallest and most  abundant photosynthesizers on Earth… And they drift out in the open oceans  and draw down enormous amounts of carbon dioxide from the atmosphere, locking the carbon up in their cells.

它们是地球上最小、最丰富的光合作用器… … 它们漂流到公海中， 从大气中吸收大量二氧化碳，将碳锁在细胞中。