生词：

colon cancer 结肠癌

micro RNA  小RNA

We all know about the major risk factors for cancer--smoking, fatty foods, exposure to the sun and heredity. Now, scientists are closer to discovering what triggers cancer on a cellula level.

我们都知道罹患癌症的主要诱因－吸烟，油腻的食物，阳光保晒和遗传。如今，科学家在细胞级别发现引发癌症的原因上更进了一步。
CK is a genetic researcher at Ohio State University. K and his colleagues have identified a class of genes called  macro-RNA. They control other genes in our bodies. Altered macro-RNA(micro) genes had already been found in many types of cancer. So K's team purposely altered a single type of micro-RNA gene in lab mice. The result, the mice developed leukemia and lymphomas.

K是俄怀明洲立大学的一名基因研究者，K和他的同事已经鉴别出一种叫做宏核糖核酸的一组基因。这组基因控制我们身体中其它的基因。变异的小核糖核酸已经在很多种癌症种被找到。所以K的团队故意改变了用作试验的老鼠的一组小核糖核酸，结果老鼠患上了血癌和淋巴瘤。
K. says the next step is to find treatments that conter the effects of the altered micro-RNA. So far, he and his team have come up with a way to shut off the activity of the very active micro-RNA--that's preventing it from creating cancer cells. The good news is ,K says, the technology to manipulate the activity of micro-RNA already exists.

 k说，下一步将要找到抵消这些变异的小核糖核酸带来的副作用的疗法。至今为止，他和他的团队已经找到了一种关闭非常活跃的小核糖核酸活性的方法，这样就能够组织它生产癌细胞。k说，好消息是操作小核糖核酸活性的技术已经存在了。

Besides human leukemia and lymphomas, micro-RNA genes also have been found in human lung, breast and choleic(colon) cancers.

除了人类的白血病和淋巴瘤，已经在人类的肺癌，乳癌和胆囊癌中小核糖核酸基因。