When small fish face an extremely difficult problem-an attack, say, from several predators at once-they deal with it by forming a school.
当小鱼面临极其困难的问题时，比如说，突然遭到几个捕食者的袭击，他们会立刻形成鱼群。
If you assume your site will never come under attack, or face any problems of any sort, then when something eventually does go wrong, you will be in massive amounts of trouble.
最后，变得偏执一点吧。除非你认为你的站点永远不会受到攻击，否则就正视所有的问题，当问题真正发生的时候，你的情况会变得很糟。
Second, even if its exchange rate is not overvalued, a country could face a successful attack by forex speculators if it does not have a very large amount of foreign exchange.
第二，即使一国货币的汇率没有被高估，如果它没有大量外汇储备，也有可能受到外汇投机者的成功袭击。
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