新技术应该提供一个安全的防火墙以防御黑客。
New technology should provide a secure firewall against hackers.
许多科学家和专家警告说，在动物饲料中滥用抗生素，如青霉素、四环素，会滋生流行病，而这种流行病是没有医药可以防御的。
Many scientists and experts warn that rampant use of antibiotics in animal feed, like penicillin and tetracycline, will breed an epidemic that medicine has no defense against.
这些城镇是一位才华横溢的,军事工程师的作品,他叫沃邦or Lille or montmédy, they're all over the place. 在那个基本上以防御战为主的年代,这些要塞城镇就如同堡垒一样
You go to a place like Perpignan And these are fortress-like defenses in an age of essentially defensive warfare.
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