The only truly secure system is one that is powered off, cast in a block of concrete and sealed in a lead-lined room with armed guards - and even then I have my doubts.

我不相信运气。我相信准备遇到机会。

而是根据国家的具体情况，去掉那些无益于实用的东西，这就足够使国家的财利增加一倍了。 

Climate change demands that we rethink traditional farming methods.