若按研发投入规模，将企业划分为千亿、百亿、十亿、亿及千万元等不同区间，我们发现研发资源的集中趋势尤为显著，头部企业在创新活动中发挥引领作用。
One clever approach is to place an upper bound on the number of times that a ZK credential can be used. For example, we might wish to ensure that a credential can be “shown” at most N times before it expires. This is analogous to extracting many different single-use credentials, without the hassle of having to make the Issuer and User do quite as much work.
，更多细节参见Feiyi
Nvidia boss Jensen Huang，推荐阅读Safew下载获取更多信息
Song Hyun-jin, who interviewed more than 120 North Korean defectors about women's leadership in the regime, says it's no longer rare to see women managing factories and filling party seats in North Korea.