Parasites, in other words, are everywhere.
换句话说,寄生虫无所不在。
They are also, usually, more abundant than their hosts.
通常,它们的数量也远远多于它们的寄主。
An astute observer might therefore have suspected that the actual most-common specieson Earth would be a flea that parasitised P. ubique, rather than the bacterium itself.
精明的观察者可能因此会猜测,地球上真正最常见的特种是一种跳蚤寄生的遍生远洋杆菌,而不是细菌本身。
The absence of such fleas has puzzled virologists since 1990, when the SAR11 group wasidentified.
自从1990年研究SAR11组群以来,病毒学家对没有发现这种跳蚤即以所谓攻击细菌的噬菌体的形式存在而感到很困惑。
Some thought the advantage this absence conferred explained the group s abundance. Butno.
一些人认为没有发现这种组群的好处解释了它们之所以大量存在的原因。但是,事实不是这样的。
As they report in this week s Nature, Stephen Giovannoni of Oregon State University and hiscolleagues have discovered the elusive phages.
正如本周自然杂志上刊登的一样,俄勒冈州立大学的斯蒂芬尼-乔凡诺尼和他的同事们发现了这种难以发现的噬菌体。
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