So as you see although we call foo function three times the initialization of a static varible is done only once.

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；

youdao

There are sensory neurons, which take information from the world so as you see me, for instance, there are neurons firing from your retina sending signals to your brain.

感觉神经元，负责收集外界信息，比如，当你看到我的时候，视网膜上的神经元会产生神经冲动，将刺激信号传递到你的大脑。

youdao

"So, my beauty," said Hook, as if he spoke in syrup, "you are to see your children walk the plank."

“那么，我的美人儿，”胡克嘴上像抹了糖浆似地说，“你要看你的孩子们走跳板。”

youdao

Mist can take you on a boat ride up and down the river so you can see the animals as they come to drink or play in the water.

VOA: special.2009.08.19

There are sensory neurons, which take information from the world so as you see me, for instance, there are neurons firing from your retina sending signals to your brain.

感觉神经元,负责收集外界信息,比如,当你看到我的时候,视网膜上的神经元会产生神经冲动,将刺激信号传递到你的大脑

耶鲁公开课 - 心理学导论课程节选

So you can see right away the students knew that they will be selected as a very honor to the pool.

所以，学生们很快,就会知道他们将成为,该组织的荣耀。

麻省理工公开课 - 媒体、教育、市场课程节选

So as you can see, Super Bowl players actually have quite a lot in common with people in business.

FORBES: Why the Super Bowl is like the Business World.

"So as you can see some of this may be difficult, " he noted.

CNN: Iraqi official: Security pact likely on hold until U.S. election

So, as you can see, the KIPP schools studied do show significant attrition, and the comparable public schools show no such pattern.

FORBES: The Continuing Success of KIPP Schools