Kras
n. 喀斯特（岩溶地貌）
例句
Of the KRAS mutations detected, 17% were outside of codons 12 and 13.
KRAS的基因突变中，我们检测到17%是位于12号和13号密码子以外的。
About 30 percent of human lung cancer patients have mutations in Kras.
大约30%的人类肺癌病人有Kras突变。
About 40% of these patients have a KRAS gene mutation, and respond poorly to such antibodies.
约40%患者有KRAS基因突变而对这类抗体反应很差。
