假如一个问题对你来说太狭窄，或者只包括一个讲座或一本书籍，别被扔下了。
Don't be thrown if a question seems to you too narrow or covers only one lecture or book.
英国的两位女士只在夜晚或者是早上出现了神秘的视力问题，结果是由一个相当无伤大雅的原因引起的的——那就是在黑暗中看手机。
For two women in the United Kingdom, mysterious vision problems that happened only at night or early in the morning turned out to have a rather innocuous cause: looking at a smartphone in the dark.
英国的两位女士只在夜晚或者是早上出现了神秘的视力问题，结果是由一个相当无伤大雅的原因引起的——那就是在黑暗中看手机。
For two women in the United Kingdom, mysterious vision problems that happened only at night or early in the morning turned out to have a rather innocuous cause: looking at a smartphone in the dark.
你回答你的问题基本。静态变量（一个函数或者类的成员变量或局部变量）是只初始化一次，终止。例如；
So as you see although we call foo function three times the initialization of a static varible is done only once.
问题是这个用法可能只适用于一个或者几个例子，因此在标头上添加脚本可能是不必要的。
Odds are that this usage is for one or only a few instances, so adding the script to the header would be unnecessary.
问题是这个用法可能只适用于一个或者几个例子，因此在标头上添加脚本可能是不必要的。
Odds are that this usage is for one or only a few instances, so adding the script to the header would be unnecessary.
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