The associated problems with this weed include its competitiveness, difficulty of control, and the reduction of quality through genetic contamination of pure lines of rapeseed and the like.

与自生油菜(杂草)相关的问题包括杂草的竞争性、难以控制以及通过对油菜纯系的基因混杂造成油菜品质的下降等等。

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The cells were tested for karyotype, sterility, contamination with exogenous agents and cross contamination, and analyzed for genetic stability by isoenzyme map.

进行无菌检查、细胞核型和同工酶谱分析，了解细胞遗传稳定性、外源因子污染和细胞间交叉污染情况。

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The lawsuits allege no actual damage but claim regulators failed to adequately consider the possible effects of genetic cross-contamination between genetically engineered and conventional crops.

FORBES: Magazine Article

An airplane crash does not have the possibility of the continued risk of killing people by radioactive contamination or genetic mutation decades or even permanently into the future.

FORBES: Nuke Closures Could Cost Japan 5.6 Percent of GDP