描述：设计 StockSpanner 类。每次调用 next(price) 时，返回当日价格的「跨度」：从今天往回数，价格 ≤ 今日价格的最大连续天数（含今天）。
Same-font vs cross-font: font pairing matters，推荐阅读safew官方版本下载获取更多信息
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Kinisi's prototype hand cost around £4,000 ($5,400) to make, 10 times the cost of the simple pincer the firm currently uses, which costs just £400.。Line官方版本下载对此有专业解读
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It is focussed on West Antarctica, home to 30-40% of the global population of Emperor penguins. The animals are amongst the most threatened in the world.