A background thread might read this sensor every few seconds and update a volatile variable containing the current temperature.

一个后台线程可能会每隔几秒读取一次该传感器，并更新包含当前文档的volatile变量。

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The idea here is that the volatile variable initialized acts as a guard to indicate that a set of other operations have completed.

这里的思想是使用易失性变量 initialized 担任守卫来表明一套别的操作已经完成了。

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Happens-before orderings across threads are only created by synchronizing on a common lock or accessing a common volatile variable.

只有在通用锁上执行同步或访问一个通用的可变变量时，才能创建跨线程的Happens - before排序。

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Conversely, the ransoms mean higher insurance premiums for the rattled shipping industry, delays for customers as more ships choose the longer passage around the Cape of Good Hope, lower revenues for the Suez Canal, and for the oil markets yet another variable to work into already volatile prices.

ECONOMIST: Somalia

In a volatile atmosphere like the present you should think of capital structure as a variable that can greatly influence the success or failure of a business enterprise.

FORBES: Dow Jones Interactive