他们在使烟草细胞接触锌指核酸酶之外，也添加了可增强抗除草剂特性的基因片段。
When they exposed tobacco cells to the zinc finger nucleases, they also added a version of that gene that enhances herbicide resistance.
科学家使用一套酶轻微改变烟草作物的DNA使其具备抗除草剂特性。
Scientists used a set of enzymes to "subtly change" a tobacco plant's DNA to make it herbicide resistant.
除了这些特殊的气候特征外，古巴烟草种檀区土壤的化学特性对于种植烟草来说是再合适不过了。
Apart from these special climatic features, the chemical composition and agricultural properties of the soil in Cuba's tobacco-growing areas couldn't be bettered.
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