But it's easier for communities to buy equipment - and look for tech solutions - because there's Homeland Security money and no shortage of contractors to supply the silver bullet.
但公众购买设备(以及寻找高技术解决方案)变得更容易，因为有国土安全部的钱，也不缺提供优秀解决方案的承包商。
The shortage of money (silver) in the Tang- Song Dynasty and the Ming-Qing Dynasty is a typical deflation in history, and so it is worth studying and analyzing.
唐宋及明清之际的钱（银）荒是我国历史上通货紧缩的典型，值得我们去研究和分析。
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