方案的前向安全性保证了签名密钥可定期更新，即使当前时间段的签名密钥被泄漏，敌手也不能伪造先前的签名。

Forward security of the scheme means that even if the secret key of current time period is compromised, some security remains. It is impossible to forge the signature relating to the past.

youdao

由于[CurrentMonthSales]数据集更小，所以当前月份或整个时间段的销售数据的查询性能得到了改善。

Because of the smaller size of the [CurrentMonthSales] cube, the performance for queries that are run against the sales data of the current month or the entire time period is improved.

youdao

这种“疾病压缩”，即慢性病和能力丧失被压缩到生命终了前的很短的时间段内，是老龄化人口中的一种当前趋势。

This "compression of morbidity", where chronic illness and disability are squeezed into ever-shorter periods at the end of life, is a recent trend among ageing populations.

youdao

I should say income today on this axis and on this, income next period.

轴表示当前的收入,y轴表示下一个时间段的收入

耶鲁公开课 - 金融市场课程节选