Large, easy-to-read dial helps ensure rig safety Extra-large face and movingpointer provide instant trouble indications from a distance.
便于阅读的大表盘确保测量安全超大表盘和可动指针可以即时指出远程压力出问题的迹象。
2
Rather than wait for the other thread to finish, the current thread can "help" it out by finishing the operation for it by moving the tail pointer forward (b).
不必等候其他线程完成，当前线程就可以“帮助”它完成操作，把尾指针向前移动(B)。
3
When clicking the backward and forward buttons for the application, we won't be adding new events to the stack but we will be moving the pointer within the stack.