stacked top

• 栈顶

stacked top的用法和样例：

例句

1. Take a string off the top of the stack.
   从栈顶取得一个字符串。
2. We will see below how to take into account the case of an empty stack, which has no top to be popped.
   我们将在下面看到如何考虑一个空栈的情况，栈中并没有栈顶元素可以被弹出。