The history of financial crises shows that turning points can come swiftly and without much warning.

金融危机的发生历史表明，由盛入衰的转折点可以来的很快，而且没有太多的先期警告。

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This means that your application is likely to quit without much warning, so you should be prepared to save user changes as they are made, as quickly as possible.

这意味着你的应用程序有可能在没有任何预警的情况下被关闭，所以你要时刻准备好尽可能快的保存用户做出的改动。

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Much of northern Japan remains without power, so it remains to be seen if the system, which was triggered, arrived in time to provide a useful warning.

日本北部的大部分地区仍然没有电，因此，这个已经启动的系统是否会及时提供有用的警报，仍有待于观察。

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Death seems ever-present in the slum, where a fever or disease easily caught from unclean water in the rainy season can claim a life without much warning.

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The rain came without much warning.

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Kenya - enraged by the kidnappings and the damage to its tourism industry and development plans - lashed out without warning or much planning, catching everyone off guard and sending its untested army into what could well prove to be a very dangerous trap.

BBC: A lot to lose - Kenya's Somali gambit