With this arrangement, even if Thread B has modified the top while Thread a tries to pop, you're sure that no elements in the stack are skipped.
这样，即使线程b在线程A试图弹出数据的同时修改了堆栈顶，也可以确保不会跳过堆栈中的元素。
2
The arrangement of the organic ions differed with their different stack density in the layer.
在不同密度堆积状态下，有机阳离子在层间的排列方式存在差异。
3
The book stack establishing work currently include organization books, books arrangement, shelf allocation and put up on books etc. The shelf allocation is the key and difficult point in whole works.