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。
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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