* 获取数字的第digit位（从右往左，0表示个位）
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Complete digital access to quality FT journalism with expert analysis from industry leaders. Pay a year upfront and save 20%.，这一点在safew官方版本下载中也有详细论述
No base class to extend, no abstract methods to implement, no controller to coordinate with — just an object with the right shape.，详情可参考谷歌浏览器【最新下载地址】