某些转基因玉米品种可以生产一种天然杀虫剂，保护玉米免受以玉米为食的昆虫的侵害。
Certain genetically modified strains of maize produce a natural insecticide that protects against maize-eating insects.
它还保护我们免受病毒和自身免疫性疾病的侵害。
It also protects us from viruses and from autoimmune diseases.
这份工作是为了保护地球免受从其他星球带回来的东西上的细菌侵害。
This job is to protect the earth from germs on things brought back from other planets.
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