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A good example of this would be a user using the application, taking a lunch break, and returning to the application after the authentication key had expired.

这方面的一个很好的例子是用户正在运行应用程序，午饭过后，当他返回到应用程序时，认证密钥已经过期了。

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The key is knowing when to follow the rules and when to break them.

关键是要知道何时该循规蹈矩，何时需破旧立新。

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The metals are explosive movers, so be wary that a break of key support levels could lead to much deeper retracements.

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Given the oversold reading of the RSI3, a break of the key chart support (line a) may be followed by a rebound.

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You can see the breakout in the chart above and can click on these divisions to see a further break out of key drivers.

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