They built the library under the ground to keep it safe from bombing.
他们把图书馆建在地下以保护它不受轰炸。
So under most circumstances, it is safe to load a library with the same major number and a higher minor number; consider it an unsafe practice to load a library with a higher major number.
这样，在大部分情形下，加载具有相同主版本号和更高次要版本号的程序库是安全的；而加载主版本号更高的程序是不安全的行为。
Library functions have dire warnings that they may not be "thread safe."
调用库函数时经常会遇到一些“线程不安全”的可怕警告。
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