For years, organic farmers have been using sprays containing Bacillus thuringiensis, or Bt, a naturally occurring bacteria, different strains of which are toxic to certain insects.
多年来，有机农业种植者一直在使用有苏云金芽孢杆菌（以下称作Bt）的喷雾.Bt是一种天然的细菌，是对特定昆虫有毒害作用的不同种的菌种。
The two varieties that passed safety inspection express a gene for a protein from the bacterium Bacillus thuringiensis (Bt) that's toxic to insects.
两种通过安全检测的水稻品种表达了一种来自苏云金芽胞杆菌（Bt）蛋白的一种基因，能够使得害虫中毒。
The techniques for seperation, dissolution and purification of the toxic protein crystal from Bacillus thuringiensis are reviewed in this paper.
本文介绍了苏云金杆菌晶体毒素的分离、 溶解及纯化技术。
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