At the extreme opposite end of the size scale, the class of marine bacteria, the Prochlorococci -- that will be on the final exam -- although discovered only in 1988, are now recognized as likely the most abundant organisms on Earth, and moreover, responsible for a large part of the photosynthesis that occurs in the ocean.
而在生物体体型大小的另一端，我们发现了新的海洋细菌 原绿球藻，也许在你的期末考试出现过 虽说是1988年发现的，现在则被认为是地球上最繁盛的生物 这一生物为海洋里头发生的光合作用起到了很大的推动作用