Watch the variables being used in a function. If you notice a function using an out-of-scope variable more than once, store it in a local variable and use that instead.

仔细检查函数中所有使用的变量，如果有一个变量不是当前作用域定义的，而且使用了不止一次，那么我们就应该把这个变量保存在局部变量中，而使用这个局部变量来进行读写操作。

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The goal of this tool, built on the power of instant messaging, is to watch for performance and function failures and report them to the appropriate support team.

该工具构建在即时消息之上，它的目的是监控性能和功能故障，并将它们报告给相应的支持团队。

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This Watch camera have a special function, you can use it as a PC camera on your computer.

这块手表相机具有特殊的功能，您可以使用它作为一个摄像头在您的计算机上。

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And for those who follow the global markets, Girard-Perregaux's watch provides a financial function that keeps track of opening and closing times on the stock exchange in New York, London, Hong Kong and Tokyo.

WSJ: World-Time Keeping Wristwatches

Mr Morrison highlighted changes such as a new unit in Houston focused on monitoring wells being drilled offshore to watch for signs of trouble: a function that he said had no parallel in other companies.

CNN: BP claims it now leads the way on safety

The watch is powered by a regular button cell, but thanks to the low-energy design, the watch can go two years between battery changes, assuming that the Bluetooth function is used for about 12 hours per day.

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