Surely scrapping such limits on defences was a mistake ?

废除这种限制防御机制是一个彻头彻尾的错误吗？

I believe that there are perfectly good defences against all these criticisms .

我坚信，对于上述这些批判，都可以找出完美的辩护。

China is already coming up with better defences .

中国已经做出了更好的防御手段。

Some of these defences are simple barriers .

不过其中的一些防御只是一些简单的屏障。

Mrs merkel has shored up her defences .

默克尔已经强化了她的防御措施。