而Bt抗性也会产生不可取代的危害，不仅是对于基因改良作物，还有那些需要用Bt喷雾来抗虫的作物。
Insect resistance to Bt would do irreparable harm, not just to genetically modified crops, but to organic crops as well, because Bt sprays would be rendered useless.
在没有详细而系统地研究喷雾燃烧的情况下，不可能完成非线性速度敏感性的定量分析。
Quantitative specification of the nonlinear velocity sensitivity cannot be accomplished without detailed and systematic studies of spray combustion.
如果不可能进行不同的喷雾器的购买和租用，喷雾器必须用专门生产的清洗剂清洗。
In case that purchase or renting of different sprayers is not possible, sprayers must be washed with detergents pro duced specially for this purpose.
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