One would be to take a lot of different strains of this organism -- some that produce a lot of toxins, some that produce a little -- and take those strains and spew them out in different countries.
一个实验需要许多不同株这类病菌-- 一些会产生许多毒素，一些产生很少毒素-- 然后把这些株放至不同的国家。