// 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）
The last decade hasn’t been smooth. Brewster rattles off challenges: tariffs on equipment and consumables sourced from China, Europe, Mexico, and Canada; price hikes on vinyl and paper; labor shortages; and SBA lending issues layered on top of the whiplash of COVID, when only “necessary businesses” were allowed to stay open.
。关于这个话题，heLLoword翻译官方下载提供了深入分析
Begg took three maternity leaves of around six months in the space of five years, returning to work each time in a four-day week capacity.
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