1.两个重要概念（1）A Unix timestamp is a floating point value with no explicit mention of day, month, or year. This value represents the number of seconds that have passed since the "epoch", or the first second of the year 1970.时间戳是一个浮点值，它没有明
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Failure to plan is planing to fail.
作者:Apep | 分类:每日一条 | 浏览:22 | 评论:0