thread safe的用法和样例：
例句
- Don't take all the warnings not to block in this function to mean that you can neglect its thread safety.
不要将所有告诉您不要在该函数中阻塞的警告理解为可以忽视它的线程安全性。 - Inserting an object in containers that will be modified by different threads has no thread safety guarantee, although in most platforms it will be thread-safe without locking.
向一个会被其它线程修改的容器插入对象是没有线程安全性保证的，虽然在多数平台上，它是无锁定线程安全的。
