Thought to be made from a cattle femur, this decorated Anglo-Saxon spindle whorl, used to provide weight while spinning yarn, was unearthed from farmland near Bishopstone, Buckinghamshire.
– Choose an an appropriate window frame style for the location, keep the view consistent to the aspect ratio, rather than creating a collage.
。关于这个话题，heLLoword翻译官方下载提供了深入分析
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// 易错点4：栈空时要存-1（题目要求无更大值返回-1），而非直接存stack2.at(-1)（会得到undefined）