这也构成了一个难以解决的战略窘境：网络和生物袭击的特征就是，他们所具备的无视和躲避防御系统的能力。
And both pose a particularly difficult strategic quandary: a hallmark of cyber and bio attacks is their ability to defy deterrence and elude defenses.
植物能够对光照做生物学‘计算’，利用光照的信息来建立自身防御系统抵抗当季的流行疾病。
So the plants perform a sort of biological light computation, using information contained in the light to immunize themselves against diseases that are prevalent during that season.
免疫治疗，也叫生物治疗，是激发机体自身防御系统抵抗癌症。
Immunotherapy, also known as biologic therapy, stimulates the body's own defense systems to fight cancer.
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