研究人员在20年前就已经发现了吉姆萨阴性细菌，例如大肠杆菌，可以降解并重新利用其核糖核酸。
Researchers have known for more than 20 years how so-called gram-negative bacteria like Escherichia coli degrade and recycle their RNA.
核糖核酸的干扰作用为研究人员搞清生命生长提供了一个新工具——比如说，植物是如何展现其独特外形的，婴儿的小手在母体里是如何形成的，等等。
RNA interference gives researchers a new tool for understanding how living things grow--how a plant assumes a particular shape, for example, or how a baby's hand forms during gestation.
核糖核酸干扰(RNAi)会攻击恶性组织细胞里的专门基因，让其丧失功能并且最终将其杀死。
RNAi (Ribonucleic acid interference) is a technique that attacks specific genes in malign cells, disabling functions inside and killing them.
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